“Proceeding On”
To The Lewis and Clark Airgun - III
By Robert D. Beeman Ph.D.
NOTE: This is NOT
the latest info on the Lewis and Clark airgun. For that please click on
the Lewis Assault Rifle
section and follow that up with the section on Austrian Airguns!
Partially updated, revised,
enlarged, and
corrected from the article of the same title in The
Second Edition of the Blue Book of Airguns, 2002.
This chapter established 23 March 1999. Latest update 6 May
2008.
UNDER CONSTRUCTION - NOT YET FINISHED!
(Note especially that figures are being added and rearranged; figure
numbers are not yet completed.)
This
material supersedes my previously published material!
Please DO NOT use or quote earlier, outdated material!
Exciting new evidence recently has led to another airgun as the actual
airgun carried by Lewis and Clark. Click on this blue title to
view the Lewis Assault Rifle
section of this website. Despite the fact that new information and
additional research has superseded the preliminary indication that Lewis
carried a single shot air rifle made by Lukens, the following paper
gives some very important basic information about the search for the
Lewis airgun, Lewis' equipment gathering period in Philadelphia, the
Lukens/Lewis connection, and much new information on the Lukens and Kunz
airguns of Philadelphia. It is basic to understanding the matter of the
Lewis air rifle.
Material on Girandoni Austrian Repeating Military Air Rifle and other large bore antique airguns is also presented in
another section of this website. Click on the title
"Austrian Big Bore Airguns" to view this big NEW section.

Fig.
1.Captain Meriwether Lewis
Oil painting by Charles Willson Peale. Courtesy of
Library of Congress
NOTE: A preliminary full set of illustrations may be viewed in the
Second Edition of the Blue Book of Airguns (cited in the Literature
Review section of this website). Some are in
progress of being posted here. The remaining illustrations, plus some
that have never before been published, and captions are in progress. (However,
no figures are missing - if you cannot see some of the images, this
probably is due to a conflict between the Microsoft Front Page program,
used to create this website, and reading programs on your computer.
Firefox and Safari servers seem to have a special problem with this
material. If you cannot see some of the images, please send details as
to what figures and as what server you are using to:
Website@Beemans.net )
Most Americans are not aware that Captains Meriwether Lewis and William
Clark carried an airgun during their famous expedition
of 1803-06 into
the
Pacific Northwest. Actually, there was no widespread public announcement of this gun
until Twaites' 1904 rendition of the original journals of the Lewis and
Clark Expedition and the more widespread and definite rendering of those
journal by Moulton in 1983-2001. Moulton's edition of the Lewis and
Clark journals has 39 references to this airgun.
Certainly this gun is the most important individual airgun in American
history and perhaps the world. It joins the Deringer pistol which killed
President Lincoln, and the Italian Carcano rifle which killed President
Kennedy, as one of the most important individual guns of any kind in
American history. And we can be a good deal prouder and happier about
this gun. This national treasure seemed to have disappeared in
the last weeks of 1806 when Captain Lewis sent it in Box No. 2 of two
boxes to be taken from St. Louis to Washington by a Lt. Peters[1] (Thwaites, 1904).
It has taken almost two centuries to
apparently crack the mystery of its identity.
Until recently, I felt, and stated (Beeman, 1977), that the
identification of this airgun had pretty well settled on a .32” caliber
air rifle (fig. 2) made by Isaiah Lukens, horologist and gunsmith in
Philadelphia. Then, Doug Wicklund, firearms curator at the wonderful new
National
Firearms Museum at the National Rifle Association headquarters in
Fairfax,
Virginia, told me that he had heard of new journal
information from that expedition, in which it
was stated that the airgun was the same caliber as the soldiers’ rifles.
No reference to the airgun’s caliber had previously been reported. It
had become a matter of historical faith that the soldiers in the Corps
of Discovery, as Lewis and
Clark’s soldiers were known, were carrying U.S. Model 1803 rifles, which
were .54” caliber. A .54” caliber airgun (fig. ), which could date back
to 1803, had been found among undocumented specimens in the National
Firearms Museum and it was suspected that this could be the Lewis and
Clark airgun (Beeman, 1999).
Doug’s comments stimulated me to review my files on the
Lewis and Clark airgun. It soon became clear that there are a number of
contradictions and that some published notes must be in error. Interest
in the Lewis & Clark expedition recently has much increased, certainly
due, at least in part, to Steven Ambrose’s bestseller book, Undaunted
Courage (Ambrose, 1995) which provides a wonderful, popular account
of the expedition. And the bicentennial of the expedition created
special interest.
It seemed time to try to improve the record, so I resumed my research,
begun, as note below, in 1976,
about this gun.
Mrs. Beeman and I “proceeded on” (a now peculiar term
which appears many times in the original journals of the Lewis and Clark
expedition) to the Eastern United States to more closely examine some of
the actual guns suspected of being the Lewis and Clark airgun and to
research the involved literature and records at the Library of Congress
and various museums. We were determined to at least shed more light on
the interesting airguns that have been suspected of being this famous
airgun.
A bit of personal perspective is in order. My
interest in the Lewis and Clark airgun had its most serious beginning in
January 1976 when I was visiting a fellow collector in Philadelphia, the
late Henry Stewart Jr., who is best known for his collection and
incisive studies of revolving firearms and blunderbusses. While we were
working together in his gunroom,
Henry excitedly bare handed me the Lukens air rifle
that Wolff (1958) illustrated as item 4 in his figure 63. Henry
indicated that he was about to publicly identify it as possibly being
Captain Lewis’ airgun.

A). Right hand side, lock area of Lukens DNH. Lock at
rest.

B). Full length, right hand view.

C). Left hand side, lock area.

D). Left hand side of buttstock air reservoir.
Click on thumbnail image for larger view. Use landscape
format for printing.
Fig. 2
A-D. Views of the Lukens DNH air rifle. Bottom two photos by R. Beeman
©2001
Robert David Beeman.,
top two photos by Virginia Military Institute.
Henry Stewart at first felt that Isaiah Lukens had made
this gun and that it may have been loaned to Meriwether Lewis for the
expedition. Henry based his conclusion about Lukens on an incredible
piece of luck that resulted from his intensive search for information on
the Lewis and Clark airgun. It had been suggested that he check the
Franklin Institute in Philadelphia. Upon inquiring there about Isaiah
Lukens, a Mrs. Wumwreth said, “oh, yes, we have a pamphlet here on the
sale of his effects”! That booklet announced the sale of the effects of
Isaiah Lukens’ estate on 4 January 1847 (Fig. 3). Item #95 was “1 large
air gun made for and used by Messrs. Lewis and Clark in their exploring
expeditions”. The Lukens’ “Kentucky Style” air rifles, discussed in the
present article, are indeed fairly large airguns, but they are only
marginally large bore. Stewart (1982) later reported that his friend,
Bruce Madson, found an ad for that estate sale in the Pennsylvania
Inquirer and Gazette of January 4, 1847 which led him to a report of the
money paid for the various items. Unfortunately, item #95, the Lewis and
Clark airgun, apparently was withdrawn from the sale. Stewart could not
trace that gun further.

Fig. 3.
Section of the Lukens estate sale notice. Note reference to the Lewis
and Clark airgun as item # 95..
In the February 1977 Monthly Bugle of the Pennsylvania
Antique Gun Collectors Association, Stewart published a copy of
that announcement, concluding that the Lukens shop probably was the
source of the
Lewis and Clark air rifle, but he did not say that this gun was the one.
Stewart gave an unpublished talk on airguns to the annual
meeting of the Lewis and Clark Trail Heritage Foundation when they held
their annual meeting in Henry’s home town of Philadelphia in August
1982. By then, Stewart had developed serious doubts that the Lukens DNH
airgun actually was Captain Lewis’ airgun. Like Charter Harrison, the
previous owner, he felt that the double neck hammer must have come from
a U.S. Pistol of 1836 and thus must have been added after 1836, and he
could not find any features which clearly pointed to this particular
Lukens airgun as the very one carried by Captain Lewis. In this talk,
Henry twice stated “I do not claim it as the Lewis and Clark gun ….. but
we now know who made it, whether it is Lukens or his man Kunz….”
Halsey (1984) reported that Joseph Saxton, a prominent
Philadelphia friend of Lukens, obtained many of the items of the Lukens
estate, including some of the air canes. As a close friend, he may have
been able to have certain items withdrawn from the estate sale, such as
the Lewis and Clark airgun. Craddock Goins, a former curator of military
history at the Smithsonian Institute, found old records that revealed
that one of Joseph Saxton descendants, Joseph Saxton Pendleton, loaned
some of the memorable items to the Smithsonian in the early 1900’s.
These items were returned to the Franklin Institute in Philadelphia
sometime later. Some of the estate items, including an air rifle, made
their way into the airgun collection of Charter Harrison in Milwaukee.
He may have acquired these from Saxton’s descendants, or the Franklin
Institute, by trade or purchase.
How had the Lewis and Clark airgun gotten back to
Philadelphia? A number of the expedition’s specimens, such as Indian
artifacts and skeletons of mountain sheep, ended up in Charles Willson
Peale’s Natural History Museum in Philadelphia. Stewart suggests that
apparently what happened is that Lt. Peters, carrying these natural
history specimens, as well as the airgun, was told by President
Jefferson to stop in Philadelphia and give the natural history items to
Peale instead of bringing them to Washington or Monticello. Lt. Peters,
or perhaps Peale, apparently returned the airgun to its source, Seneca
and/or Isaiah Lukens. Peale kept these artifacts and natural history
items in his Natural History Museum in the upper floor of Independence
Hall for many years, along with his famous portrait paintings. When he
finally couldn’t afford maintaining the museum anymore, he sold the
natural history collection to the famous showman P.T. Barnum.
The above airgun may be the DNH Lukens air rifle which G.
Charter Harrison, who evidently was America’s first really serious
airgun collector, had identified in the May and June 1956 issues of Gun
Report as the Lewis and Clark airgun. Not having had the advantage of
seeing other Lukens or Kunz airguns, Harrison thought that the most
unusual hammer lug of the Lukens DNH airgun may been made by John
Shields, the expedition’s blacksmith/gunsmith, and suggested the idea
that this was part of Shield’s ingenious repair of the “main spring” of
Lewis’ air rifle. Then, in the November 1957 Gun Report, he reversed
himself and designated the Kentucky style ball reservoir air rifle
(figs. 22-24), illustrated as item 1 in the same Figure 63 of Wolff
(1958), as the Lewis and Clark airgun. As a result of that conclusion,
Harrison presented the Kentucky style ball reservoir gun to the
Smithsonian Institute as “The Lewis and Clark Air Rifle” and apparently
sold the Lukens DNH gun to Henry Stewart, probably via my long lost
airgun collecting friend, Warren Moore (author of Guns by Warren
Moore, 1963). After Harrison’s mental health collapsed, his collection,
as illustrated in Wolff (1958), became scattered as his wife sold off
pieces to pay his medical bills. However, in the 1970s when I
painstakingly traced and purchased most of Charter (Nick) Harrison's scattered
collection, two of the key candidates for the honor of being the Lewis
and Clark airgun already had eluded me! When Henry Stewart passed away
on October 12, 1988, his fabulous gun collection, about 800 pieces, the
backbone of which is a truly wonderful collection of revolving firearms,
plus several important airguns, went to his alma mater of 1935, Virginia
Military Institute in Lexington, Virginia. (The VMI website concerning
this collection is at http://www.vmi.edu/museum/HMS.html.)
The late Henry Stewart, and those who since have
considered the above Lukens air rifle, have had an enormous advantage,
not shared by Harrison and other students of this matter. That is, by
the time that Stewart had published his paper (Stewart, 1977) claiming
Lukens as the maker of Captain Lewis’ air rifle, he had managed to
collect not only the “original” Lukens DNH rifle, discussed above, but
also another air rifle bearing the Lukens name, plus two other Kentucky
style air rifles marked Kunz. These rifles are almost identical. Three
of them are shown in figure 4. They clearly seem to show an evolutionary
series from the same school of airgun design. By the time that Henry
Stewart left us, he had collected a total of two Lukens air rifles and
six Kunz air rifles, as well as several Lukens and Kunz air canes. At
this time, I know of only three air rifles marked Lukens, and only three
Kunz air rifles, outside those in the Stewart/VMI collection. I suppose
that it is not too surprising that Stewart may have gathered almost all
the surviving specimens from the Lukens/Kunz shop(s). Stewart lived
right there in Philadelphia where the guns were made for, or at least
sold to, local customers. And, once Henry Stewart became intrigued with
the possible Captain Lewis/Isaiah Lukens connection, his very determined
nature would have driven him to quietly locate, and obtain, every
possible specimen - and price was no object to Henry Stewart. Now, we
have the advantage of seeing what features were characteristic of
airguns from these makers.
Another candidate for the Lewis and Clark airgun has been
displayed at the Fort Clatsop Lewis and Clark museum in Oregon. In
Stewart’s 1982 talk, he indicated that the “Clatsop” airgun is an
outside sphere air rifle and that it had been purchased from Charles
Stone of Virginia City, Nevada for $225 on June 26, 1962. The Clatsop
museum then purchased an airgun pump from Leonard Clayton of Napa,
California on August 12, 1965 and displayed the pump and this ball
reservoir airgun as the type of airgun equipment carried by Lewis and
Clark. Roy Chatters, of the Lewis and Clark Trail Heritage Foundation,
studied the question of the Lewis and Clark airgun at length. He first
discussed his findings in an article entitled The Enigmatic Lewis and
Clark Airgun (Chatters, 1973). This was followed by The Not So
Enigmatic Lewis and Clark Air Gun, in the May 1977 issue of We
Proceeded On, the journal of the Lewis and Clark Trail Heritage
Foundation. In the latter article, he reported that he had discovered
that Henry Stewart was working on the same question and that he had come
very close to some of the same assumptions. Since 1982, Robert and
Toshiko Beeman carried on the search and research for the Lewis airgun.
We were alone in this endeavor until about 2002.
Let’s review the clues that we have concerning the nature
of the Lewis and Clark airgun. First is the matter of power. I could not
find any journal references to the airgun actually being used to hunt
deer or even small game. Stewart (1982) reported that Volume One of the
Twaites edition of the journals has notes on pages 240 and 241 that a
deer was killed with the airgun. My examination of those pages revealed
no mention of the shooting of a deer with the airgun. There was mention
of a deer being shot on page 240, but not with the airgun. However, the
journal reports do indicate that Lewis’ airgun had significant power.
First, there is the famous incident at the beginning of their trip where
an outside visitor accidentally discharged the airgun. The fired ball
produced a gushing flow of blood from a furrow, of a depth of about a
“quarter of the diameter of the ball“, along the head of a woman some
forty yards away. Second, when Lewis accidentally was shot through the
buttock by one of his own men while hunting, he thought that Indians had
attacked him. He reported: [I] “prepared myself with a pistol, my rifle,
and my airgun, being determined as a retreat was impractical to sell my
life as deerly as possible”. Third, Whitehouse’s journal for August 30, 1804 mentioned that the Indians were
amazed, after one of Captain Lewis’ demonstrations of the airgun, that
“the Balls had entered the Tree[2],
they shouted a loud at the sight…”. Fourth, the rifle must have been
suitable for signaling. Whitehouse’s journal for August 7, 1805 reported
that Captain Lewis “fired off his air rifle several times” so that a
lost man “might hear the report”. Perhaps the gun made more sound than
would be expected when it was fired without a projectile. This journal
report indicates that the airgun's report would have attracted the
attention of a lost man in the quiet of the wilderness. However, I
suspect that the airgun was chosen as a signal gun in this incident, not
because it was louder than the available firearms, surely it was not,
but rather because it did not use up any precious gunpowder. Martin Orro
(personal communication, 30 September 2004) noted that his replica
Lukens DNH air rifle makes a much louder and unusually distinctive report when fired without a
ball and that this model can be "dry-fired" repeatedly, more than
once a second! Such a staccato of special sounds when Lewis "fired off his air
rifle several times" would be a very attention getting signal indeed.
It repeatedly has been suggested that this airgun could
have been a bellows gun because of Capt. Clark’s journal entry for June
9, 1805 that stated: “The black Smiths fixed up the bellowses & made a
main Spring to Capt. [Lewis’] air Gun, as the one belonging to it got
broke”. However, using this entry to conclude that the bellows being
discussed was the power mechanism of the airgun belies what it says and
overlooks other entries, including Lewis’ own entry for the same day
which said “as we had determined to leave our blacksmith’s bellows and
tools here it was necessary to repare some of our arms, and particularly
my Airgun the main spring of which was broken…. “. Having himself
clearly distinguished between the blacksmith bellows and the main spring
of the airgun, there should be no doubt that what was meant was that the
blacksmith set up a blacksmith’s bellows for his mainspring repair.
Also, the reference to leaving the bellows behind would be inappropriate
if the bellows was part of the airgun - or, as been suggested by others,
that the term “bellows” meant the separate air pump that is needed to
charge most pneumatic guns. Both Captains Lewis and Clark referred to
bellows and, as just noted; Lewis even specified “blacksmith’s bellows”.
The two "gunsmiths" on the expedition actually were blacksmith/gunsmiths
- a very common combination in those days.
Wood and Thiessen (1985) report the narratives of Charles McKenzie whose visit to the Hidatsa and Mandan Indians in 1804
overlapped that of Lewis and Clark. McKenzie reported that “The Indians
admired the air gun as it could discharge forty shots out of one load-”.
Given only the clue of forty shots on a single charging, it is clear
that this airgun only could have been a pneumatic with a large air
storage reservoir. This entry emphatically rules out the possibility that
it was a spring piston airgun or a bellows airgun.
The air rifle apparently was accurate, thus it probably
was rifled. If this gun had utilitized ball
reservoirs there surely would have been mention, again and again, of
such balls, of charging up such balls, and since ball reservoir guns,
with their limited air storage, virtually require spare balls, there
would have been mention of having extra reservoir balls, or of replacing
reservoir balls.
The most conclusive consideration that the Lewis airgun
could not have had a ball reservoir comes from that observation that the
airgun could fire 40 times on a single load. Brass and copper ball
reservoirs, even those made by the finest craftsmen of the period, would
have been very limited in their pressure limits and thus their capacity
of stored air. Gaylord (personal communication, 25 May 1999) stated that
a typical airgun ball reservoir would be capable of safely holding only
enough air for perhaps 10 to 12 shots, certainly not more than a few
more than that. It
has variously been reported that a heavily charged butt reservoir gun
could fire about 40 shots, although the last score or so of those
probably would be of very limited power. Thus the Lewis air rifle must have had a good
sized butt reservoir.
Captain Lewis reported replacing the sights on his air
rifle after they had been removed by an accident. Surely he would have
secured them especially well, perhaps by firming down the edges of the
sight retaining dovetail slots, after their accidental removal. Thus we should look for a rifle with both a front and a rear sight,
well secured.
Captain Lewis recorded great detail on his supplies and
equipment. He reported that he approached Schuylkill Arsenal at
Philadelphia for his special hardware needs but that they were not able
to help him and so he had firearm rifles prepared for him at Harpers
Ferry Armory about 150 miles west. Certainly the airgun wasn’t going to
be provided by Schuylkill Arsenal or Harpers Ferry Armory.
In the four months that he spent gathering equipment and
supplies for the expedition Lewis constantly traversed the roads between
Philadelphia, Washington, Lancaster, Harpers Ferry, and finally
Pittsburgh. Frank Tait (personal communication, 1 October 2000),
studying President Jefferson's biographies and Mr. Jefferson's Army,
Political, and Social Reform of the Military Establishment 1801-1809
by Theodore Crackel, NYU Press (1987), has pretty clearly established a
time line which indicates when Captain Lewis was in Philadelphia. There
is no suggestion that he had ever visited Philadelphia prior to 1803. He
must have been in Philadelphia no earlier than 9 May 1803 and was in
Frederick, Maryland by 9 June 1803, not returning to Philadelphia until
after the end of the expedition. Thus, with a maximum of one month in
Philadelphia, he certainly did not have time to have an airgun made
specifically for the expedition.
Captain
Lewis must have purchased his airgun somewhere in the roughly one
hundred and fifty mile wide triangle formed by Philadelphia, Washington,
and Pittsburgh. I base the idea of Lewis purchasing the airgun on his
remark, when writing in the expedition journal, about the airgun
injuring a woman onlooker, which referred to it as the airgun “which I
had purchased”. Henry Stewart felt that someone probably lent him the
airgun, but it would seem that Lewis would have written such a remark
only if he had recently purchased the gun. We know from Wolff (1958),
and the collecting experience of myself, and other leading American
airgun collectors, that only one shop, the clock/gun/instrument shop of
Seneca and Isaiah Lukens in the greater Philadelphia area, is known to
have produced butt- reservoir airguns during that period in that entire
area. (Although
the Lukens shop never developed a strong enough reputation to ever be
so listed, the enormous resources of the Heer de Neue Střckel [1978] references
indicate that they evidently had the Philadelphia area to themselves
until Jacob [Joseph?] Kunz, an associate or seller of Lukens airguns,
developed his trade to the point of being noticed - first being
mentioned about 1814).
Philadelphia was a small place then of only about forty one thousand
persons. (About a third of the present size of the town of Santa Rosa,
the "city fathers" would call it a city, near my home - a place where
even today, despite the lack of the provincial feeling of 19th century
towns and cities, one could find out almost immediately who in the
entire area makes or repairs guns). Lewis is known to have socialized
with several of the area’s leading residents, including the whole
American Philosophical Society and the Peale Museum crowd. (Again, using
a modern parallel, it is possible even today to meet with virtually all
of the regional "movers and shakers" of the entire Santa Rosa area at a
single party.) Much of this information came from my friend, the late
Henry Stewart Jr., who was a long time resident of Philadelphia and who
had made a long and intense study of its early leading citizens and
their families. He recorded that several friends of Charles Willson
Peale, the famous American portrait artist, had noted that Lewis met
Peale, who was also the founder of the Peale Museum and a long-term,
leading member of Lewis’ beloved American Philosophical Society.
Carolyn Gilman, Special Projects Historian at the Missouri Historical
Museum in St. Louis confirmed this (personal communication, May 15,
1999). Lewis was virtually compelled to meet with the area's
intellectual cream while in Philadelphia because that was when he was
elected to membership in that prestigious society.
Isaiah Lukens was one of the founders of the
Franklin Institute, Philadelphia and was elected as its first
vice-president and held that office for many years. Peale was well
acquainted with the Franklin Institute, having painted the portraits of
many of its members.
Stewart noted that Peale was a close friend of
Isaiah Lukens, so it would have been almost impossible for Lewis and
Lukens not to have met before the expedition. Although the Lukens shop
itself
evidently was in the little nearby village of Hampton at that time, most
of its business, indeed its very identity, and perhaps an office or a
seller (Jacob Kunz?), would have been in the
prestigious gun-making area of greater Philadelphia area.
And, as noted later in this treatise, the airgun barrels, even the air
reservoirs, and surely the hammers, for the Lukens airguns very likely were produced or sold in
Philadelphia. Note that the Lukens shop was so closely associated
with Philadelphia that they marked their guns with that city's name.
Isaiah Lukens
(born 1779) was the son of Seneca Lukens (born 1750/51), a clock and
instrument maker. It is quite likely that Seneca had begun some work on
airguns as this would have given him a market with virtually no local
competition.
(The
combination of making clocks and airguns was common. It is interesting
to note that some of the small springs in the Lukens guns actually are
clockmaker's springs and that the air valve is the type of device that an
instrument maker, rather than a gunsmith, would have designed.)
Perhaps with input from some of the many talented and skilled Europeans
pouring into the area and/or Coleman Sellers, he may have started development on a fairly
simple modification of the outside lock style of butt-reservoir airguns
which had been known in Europe for about two centuries. Seneca may have
encouraged and trained Isaiah, and perhaps his mechanic/inventor young
friend, Coleman Sellers, in this area and it is possible that he/they
actually was the primary maker(s) of the Lukens DNH airgun. The existing
Lukens airguns do not bear a first name or initial - though most writers
have attributed them to Isaiah.
Isaiah Lukens became even more renowned
than his father, Seneca Lukens, as a clock and instrument maker. Isaiah
evidently was a brilliant and highly productive person. There would be
little doubt that he would have learned clock and instrument, and
perhaps airgun, making in his early teens and there is no reason to
believe that he had not been making clocks, and airguns also, for
several years before his probable meeting with Lewis when Isaiah was 23
years old. (As noted above, neither Seneca nor Isaiah Lukens appear in
the records as gunmakers; apparently their apprentice/associate/seller
Jacob Kunz (as marked on guns, but also spelled Kuntz or Coons) was the
one to develop the trade to the point of notice.)
One of the other two Lukens .32” caliber air rifles (fig.
) that Mrs. Beeman and I examined and disassembled in the Stewart
collection at Virginia Military Institute is an air rifle, in much
better condition than the Lukens DNH specimen, marked “C.
Sellers, No. 231 High St.., Philada”. (I will refer to this arm as the
Lukens Sellers airgun.) Stewart noted that Coleman Sellers (1781-1834)
was a close friend of the famed artist Charles Willson Peale (Coleman
Sellers was married to, or later married, Sophonista Peale,
Peale’s daughter). Carolyn Gilman, Special Projects Historian at the
Missouri Historical Museum, reported that it is known (personal
communication, 15 October 2000) that Peale, several of Peale’s friends,
and Lukens socialized during his visit to Philadelphia. While
socializing with the Peales, Lewis very likely met Coleman Sellers, and
Sellers, or C. W. Peale himself, very likely would have referred to the
wonderful airguns in the Lukens shop. Thus we are drawn to the idea that
Lewis met Lukens, whose shop was the only air rifle shop available to Lewis in the small
time/location window when he was gathering expedition equipment and
supplies.
The marking of Coleman Sellers
name on the barrel of the "Sellers" airgun may be very significant.
Typically, that is the location of the barrel maker's name, while the
left lock plate is the area where the owner's name, if so marked, is
placed. Coleman and Isaiah were young men, of almost identical age, both
of whom had fathers of great mechanical ability and accomplishment.
(Coleman's father, Nathan Sellers, had been commissioned by George
Washington to make the first paper making molds in America. By
the end of the Revolutionary War Nathan had become wealthy from that
business and had branched out into other manufacturing. The Sellers family lived
at 231 High Street in Philadelphia until Nathan retired and moved to an
estate in Upper Darby in 1817. Coleman Sellers died May 7, 1834 in his
home at No. 10 North 6th Street, Philadelphia.) Martin Orro has
suggested (personal communication 14 October 2004) that is very possible
that Coleman and Isaiah, both young mechanics and inventors in the
closely-knit Philadelphia area, became friends and, as part of tinkering
with various mechanisms, developed a mutual interest in airguns. Bronze
barrels of small calibers and with high groove count rifling apparently
were not known in the Americas at that time but some were available in
Europe.. That Coleman's name appears in the finisher/maker's position on
at least one barrel (his own gun?) indicates that Coleman may have used
his father's manufacturing import connections to obtain some barrel
blanks from Europe.
Evidently the Sellers used steam engines in the family mills before the
turn of the 19th century. This would mean they possessed facilities for
maintenance, repair and limited part production of pressure tank parts.
Coleman later developed locomotive boilers. Coleman could have used this
interest and their factory facilities to copy the air reservoir from an
ordinary external lock airgun. Such buttstock shaped reservoirs and
simple valve mechanisms had been known for well over a hundred years. It would have been natural to make the
first, experimental air reservoir of this series of airguns from easy-to-work
copper. That the copper reservoir is a simpler shape than the later
Lukens air reservoirs also suggests earlier construction. Seneca Lukens' knowledge of pattern making and brass foundry techniques
would have been a natural base for his and/or Isaiah's
work on developing the receivers and other cast parts. The air valve
springs and bolts and the
firing lug springs clearly came from the clock making side of the
partnership and the locks, at least the hammers, were simply standard
flintlock units locally made or locally sold English imports. The inclusion of Coleman Sellers in the making of the Lukens
airguns is lent support by the fact that it would seem that
Coleman Sellers was too young to have been the kind of wealthy gentleman
that typically buys such expensive guns.
The smaller
caliber would make sense if a couple of young friends were making these
airguns for use in the greater Philadelphia area. There probably weren’t
too many “b’ar” around those parts by the early 1800s.
Of course, there is the possibility that Captain Lewis
purchased the airgun from someone else who simply happened to own one.
The fact that Lewis' airgun ended up in the Lukens shop after the trip
would detract from this consideration. Because it was virtually unknown
in 1847 that Lewis had carried an airgun, and that the Lewis & Clark
expedition itself was poorly known then, the auctioneer had to have seen a tag saying, or been told, that
item 95 in the estate auction was Captain Lewis’ airgun. The auction
notice stated that the airgun had been made for the expedition. We now
know that there simply wasn’t time for custom building an airgun, but
the auctioneer probably assumed that because the airgun came from the Lukens shop.
While
it is very possible that some items in the Lukens estate sale were
not made by Lukens, it seems most unlikely
that item no. 95 was
added to the Lukens estate sale from non-Lukens sources. We have no
reason to doubt the truth of the auction flyer and it is too much to
conceive that an auctioneer, surely unfamiliar, as was almost everyone
at that time, with the fact that an airgun had even been on that then
little known trip 44
years earlier, would come up with such a story for this particular
airgun.
The idea of a rifle which would not need powder on such
an extended trip through remote areas surely would have been extremely
appealing to the technically oriented Meriwether Lewis, just as it was
to later American explorers, such as Pike and Long. Lewis and Clark’s
report of their airgun probably was the reason for Stephen
Long adding an air rifle to the armaments of his “Scientific Expedition”
which left St. Louis in 1819 (Garavaglio and Worman, 1998). Other notes
in this interesting web: we know of the handsome appearance of the young
Isaiah Lukens from a fine portrait of him painted by C. W. Peale in 1816
(not 1860, the date which appears in the transcribed notes of Stewart’s
1982 talk - that would have been 14 years after Lukens’ death!). Peale
also did fine portraits of both Lewis and Clark in 1807 or 1808, after
the “Voyage of Discovery” Expedition.
If we knew the caliber of this airgun it would be a
tremendous help. The original journals of Captains Lewis and Clark, as
presently presented, make no mention of the airgun’s caliber. A
consideration that the airgun might have been of the same caliber as the
soldiers’ rifles brings us to consider the caliber of those firearms.
If Lewis had supplied his men with U.S. Model 1803
flintlock rifles, as has been the tale for decades, it would mean than
these rifles probably were .54” caliber. Tait (1999a) noted that
Carl P. Russell’s (Russell, 1960) flat statement that Lewis and Clark
carried the 1803 model has long been treated as the final word on the
subject. However, Russell gave no citations for that claim and may have
been influenced by incorrect editing in the Elliot Coues edition
of the Lewis and Clark journals. That has been blindly repeated (Halsey,
1984, etc.). Tait’s paper claims
that Lewis was not involved in the design of the Model 1803 and that
that model did not yet exist when Lewis selected 15 rifles from the
Harpers Ferry Arsenal in March 1803. Tait presents an argument that the
rifles obtained by Captain Lewis were U.S. Contract Rifles of
1792. Tait notes that the specifications for that rifle call for a
bore firing lead balls weighing 40 to the pound (almost .49” caliber).
Tait (personal communication of March 15, 2000) indicates that these
rifles were indeed of .49” caliber bore, with balls running about .475”
to .480”, contrary to many tales that these contract rifles varied
greatly in caliber. When Captain Lewis
presented his requisition for 15 flintlock rifles, he certainly would have called for, or
made, careful selection of fifteen fine specimens. Ernie Cowan and Rick
Fuller (display at Baltimore Arms Show, March 19-20, 2005; Keller and
Cowan 2006) make an
extremely strong case that Lewis' fifteen "short rifles", acquired
during his Philadelphia visit in 1802, were an "Model 1800" version of
the Model 1803 flintlocks. In any case these guns evidently were fitted with interchangeable locks. The concept of interchangeable parts was dear
to the hearts of both Thomas Jefferson and Meriwether Lewis and, as
noted by Captain Clark in his journal, such a feature was invaluable on
an expedition of this nature.
Captain Clark had a personal flintlock rifle “the Size of the ball
which was 100 to the pound”. That translates to .36” caliber. (Clark’s
expedition notes refer to it as his “Small” rifle.
Here the word
"Small" very possibility was in reference to its maker. A .36”
caliber flintlock rifle marked “Jn. Small, Vincennes”, which the Clark
family originally claimed was carried by Captain Clark on the
expedition, is in the Missouri Historical Society Museum. Střckel
(1978-82) records John Small as a gun maker and sheriff in Vincennes,
Knox County, Indiana during the period 1780 to 1823. Bud Clark, a modern
descendent and long time student of the Lewis and Clark expedition,
reported (personal communication, April 15, 2002) that the family now
knows that the displayed gun was produced after the expedition.
Apparently only a single lead ball has been found in
archeological examinations of the expedition’s campsites. Jay
Rasmussen’s excellent website (www.lcarchive.org/fcexcav.html)
about the archaeological excavations at Fort Clatsop near Astoria,
Oregon reports
that Ken Karsmizki found a lead object during the 1997 excavations of
that expedition camp site. It seems to be a lead gun ball flattened on
one side, perhaps from being fired against a hard surface. The weight of
4.2 grams would indicate a caliber of about .36” - in line with the bore
size of Clark’s Small flintlock rifle, mentioned above. Karsmizki
reported (personal communication) that there apparently was no rifling
mark, indicating that it may have been fired with a patch. Isotopic
analysis of the lead pointed to the Buick mine in Missouri - which is
consistent as a possible supply point for lead taken on the expedition.
Considering that lead for gun balls would be an extremely
precious commodity on a trip of such duration and nature, it is
understandable that lead balls would be husbanded even more carefully
than money back home and not lost around campsites. If any balls were
lost, it is even less likely that they would have been ones from this
one airgun which Lewis seems to have carefully maintained as his own. We
must note that archeological examination of the expedition’s campsites
has been extremely limited to date.
It would be delightful if we could substantiate a rumor started (as per personal communication with National Rifle
Association - confidential source) by the Smithsonian Institute, that the
airgun was the same caliber as the soldiers’ rifles. However, even that
would not now define a specific caliber and, in any case, could be a
mistaken assumption of an early writer not closely involved with the
airgun. On the basis of previous information, Captain Lewis’ airgun
could have been of almost any caliber capable of hunting and impressing
the Indians. In other words, it must have been at least .32”
caliber.
Tait (personal communication, 1 October 2000) and I
independently realized that the recorded ability of Captain Lewis' air
rifle to fire 40 times on a single charging surely is a clue to
its caliber. Gary Barnes, today's leading authority
on big bore air rifles, determined that a modern compressed air gun, of
.45" caliber, with a 9.42 cu. in. reservoir could fire eight shots at
about 120 ft. lbs. of energy. Calculating from those figures, a .45"
caliber air rifle with a 30.9 cu. in. reservoir, such as the Lukens DNH
air rifle, would be able to fire perhaps 40 or more total shots. Larger bore airguns would be
capable of fewer shots per charge.
One clue, or factor, that has been overlooked, or just
quietly assumed by those associated by those close to the quest for the
Lewis air rifle, was the rarity of airguns in America around the start
of the nineteenth century. It would be nice to identify some of actual
firearms carried on the Lewis and Clark expedition, but whether we
accept Tait’s claim that the soldiers of that expedition
were using Model 1792 Contract rifles, or the more recent, and now more
widely accepted, claim by Keller and Cowan (2006) that they
carried special versions ("Model 1800") of the U.S. Model 1803 rifles, those specimens would have come from
series which contained thousands of similar guns. On the other hand,
large bore airguns have always been uncommon and the overwhelming
majority of those that had been made by the beginning of the nineteenth
century were still in Europe. Such airguns must have been not just
scarce, but extremely rare, in the areas frequented by Meriwether Lewis
around 1800. It is clear that rather than having to pick one specimen
from thousands of similar military or factory production guns, that when
it comes to determining the Lewis and Clark airgun, we probably have to
pick from only a handful of possible specimens, maybe from only one or
two guns which would have been appropriate and available in the small
time and space window.
We do know that a large portion of the specimens of
expensive large bore airguns, did survive
through the ages. So, not only does the Lewis and Clark airgun probably
still exist, but also it should be possible to narrow the candidates
down to a precious few.
As noted earlier, we know of only one American shop
making butt reservoir airguns prior to the Lewis and Clark Expedition. That was the shop of Seneca and Isaiah Lukens in the Philadelphia area.
Isaiah Lukens (born 1779) mainly was known as a clockmaker from the late 1790s until
his death in 1846. He made many of Philadelphia’s large clocks, but he
is best known for building the big public clock that was installed on
Independence Hall, in Philadelphia, in 1828. He spent the period from
1828 to 1840 in Europe. Apparently airgun production of the Lukens shop
was very limited. The main work was clocks and the airgun production,
especially the later airgun production, apparently was mainly air canes.
We really don't know the full span of Kunz’s airgun work. Jacob Kunz
(born 1780) was first mentioned in the literature (Střckel, 1978) as a gunsmith in
the Philadelphia area from 1814 to 1855. However, he may have been a gun
maker, designer, or at least, seller in 1803 when Captain Lewis was in
the Philadelphia area and may have been at least partially
responsible for the Lukens interest in airguns and even some features of
the Lukens designs.

Fig. 4 Isaiah
Lukens, courtesy of Library of Congress
Click on picture for larger view
It is possible that Seneca and Isaiah Lukens, who, so far
as I can yet determine, are unknown in the gunsmithing records, had Kunz
make air rifles for them and mark their lockplates with the Lukens name.
More likely, it was the other way around, with the Lukens men making
airguns under their own name and later under the Kunz mark. The
"birdcage" design of Lukens' air valve mechanism is the kind of thing
that a clock/instrument maker would have added to the modified external
lock airguns. However, I think that Seneca or Isaiah Lukens and possibly Coleman Sellers, at least
designed, and probably made, at least two, and probably all, of the four
air rifles, which are known to the author, that bear that name. Kunz
may have obtained guns from Lukens, but probably later made some of the
rifles which bear his name as he became more skilled and finally became
a 19th century
American gunsmith worthy of historical note. Kunz seems to also have
taken on the Lukens air cane designs and greatly improved them, even
adding a breech loading mechanism. The air rifles marked Kunz and Lukens
very closely follow similar designs, but later Kunz airguns show a very
interesting evolution to a completely enclosed lock mechanism and a two
shot air/percussion capacity.
At this time, apparently only sixteen air rifles from the
Lukens and Kunz shops are known, five are marked Lukens, eight are
marked Kunz, and two are unmarked. The basic pattern of these is
Kentucky style with full-length wood forearms and handsome Kentucky
style trigger guards. I have examined all eight of these air rifles in the Henry Stewart
collection at VMI. Two of the others, one marked Lukens, and one
unmarked, but reasonably ascribed to Lukens, are in the Buffalo Bill
Cody Firearms Museum. Another specimen,
reportedly .31" caliber, here known as
the "Copper Lukens"*, was sold from an
illustrated color ad in the March 1989 issue of Man At Arms; the
author does not know of its present location*. Two of the Kunz air
rifles, a Lukens air rifle, and an unmarked one probably by Kunz, are in private
collections, the identity of which I cannot disclose at this time. Three
of the VMI museum rifles are shown in figure . They are very similar,
built around an extremely ingenious, unique lock mechanism. Gooseneck
and double neck hammers had been known on air rifles for a long time,
but their function primarily was just cosmetic or to be used as cocking
handles. However, the Lukens/Kunz school of airguns was quite
different. That is, unique among all air rifles known from other
makers, the early Lukens/Kunz air rifles simply use a regular flintlock hammer
in which is clamped a very special metal lug instead of a piece of
flint. This firing lug (figs. ) is fitted around the hammer’s jaw
clamping screw. When the gun is cocked, the lug projects at a right
angle inward from the hammer. Upon pulling of the gun’s trigger, the
hammer carries the projecting lug forward, striking an air release lever
that projects from the rifle’s receiver. While the forward moving lug
engages this lever, the lever transmits its motion through a linkage rod
(figs. ), which in turn pushes the striker rod against the air
reservoir’s valve stem. This opens an internal air release valve and
releases the blast of air that propels the projectile out of the bore.
As the hammer moves towards its forward, resting position, the lug
overrides the rear surface of the air release lever and the spring
loaded air release valve is allowed to snap shut, stopping the flow of
compressed air. The air valve is held open as long as the firing lug is
riding over the air release lever. Such a timed arrangement is superior
to simple knock-open valves in that the air release valve can be held
open longer and thus the gun can release more air per shot and have
greater power and consistency (in such airguns the projectile typically
has not left the muzzle before the release of compressed air has
ceased). When the hammer is recocked, the forward edge of the air
release lever forces the firing lug to pivot out of its way into the
jaws of the hammer. This position of the lug could serve as a simple
safety. The lug must be pivoted out to the side to again make it ready
to impact the air release lever during the next shot. This action
probably was provided by a small return spring, but could be
accomplished manually in the absence of such a spring. Notches (fig.
) in the firing lug serve to hold the lug in the proper positions and to
engage the proposed return spring. After the striker swivels to bypass
the air release lever during cocking, the return spring would push the
striker back into its ready position. Although none of the VMI specimens
still have this return spring, VMI Museum Director Colonel Gibson
examined (personal communication, 20 February 2001) such a spring on a
similar Lukens air rifle at the Buffalo Bill Cody Museum. He reports
that the return spring is an approximately 180 degree section of a flat
circular spring -- a clockmaker's spring!
*Side note:
Features of the "Copper Lukens" air rifle:
see Arms
and the Man magazine, pg. 9, March 89. Full length Kentucky
style stock rifle, similar to DNH in appearance, but, as expected of a
fine gentleman's gun - this specimen is in excellent condition. Silver
trigger guard of same style as DNH gun, .31 cal., 15 groove
octagonal barrel, 34 5/8” long. Three silver pipes around ramrod. Silver
foresight with blunt side back. Lukens name in big block letters on
plain lock plate. Gooseneck flintlock hammer. "Brass" receiver with
silver lined sight groove. Bare copper buttstock shaped air reservoir.
Full length Kentucky style stock. From Joe Kindig collection.
Information on this specimen, even confidentially supplied, is actively
solicited by the author at Box 516, Healdsburg, CA 95448, or
website@Beemans.net by email.
Such information is needed to better understand the Lukens airguns and
would add value to the specimen.


Fig. 5. Above
Top: Kunz .32" air rifle (VMI museum no. 88.031.009). Middle: Lukens DNH
air rifle. Note air release lug in fired position (VMI museum no.
88.031.007). Bottom: Lukens Sellers air rifle (VMI number 88.031.008).
Note the sighting grooves cast into the two Lukens receivers and, in the
lower image, the engraving chased around the sighting groove of the
Sellers gun. Cast-in sighting grooves are a fairly common feature of
muzzle-loading rifles of this period. Photo/R. Beeman.
©2001
Robert David Beeman.
(Click on image for larger view)
Stewart (1977) notes that the basic arrangement of
striker/valve release described above is similar to the airgun lock
mechanism of the Utrecht school, circa 1650 (the "external lock
airguns" known to some airgunners today as the Liege lock mechanism)
(Wolff, 1958, figs. 41-44), where an outside overhead striker was
developed around an external cocking lever. Several of the external lock
airguns in the Beeman collection also show an air release lever which is
rather similar
to that of the Lukens airguns where that lever is more central and
partially enclosed by the receiver - a natural evolution. The Lukens airguns clearly
are an extension of such butt-reservoir, external lock airguns.
However the Lukens design adds a very special, delightfully simple, feature by using a regular
flintlock hammer with a specially keyed, swinging striker lug. Although
Lukens used regular production flintlock cocks or hammers, his locks
differ from a true flintlock in that there is no frizzen or powder pan
and, of course, no flint. I think that we should classify this mechanism
as a special variation of the outside lock airguns. It is a very clever,
simple, well built arrangement, and as noted by Stewart, it is absolutely
unique to the Lukens/Kunz school of airgun design. Later air rifles of
this series, made by Kunz, evolved from the flintlock hammer to what
appear to be modified percussion hammers.

Fig. 5. Lukens DNH air rifle.
Right rear view of double neck (post) hammer. Note the firing lug
clamped in the hammer's jaws. This is the fired position. Careful
examination will show the exposed end of the firing lug that has
released and passed over the air release lever projecting from the top
of the receiver. Photo/Tom Gaylord.

Fig. 6 Kunz .32" caliber air
rifle. Showing inner side of gooseneck hammer and firing lug after it
has released and then passed over the firing lever which projects from
near the midline of the receiver. This is the mechanism that is unique
to the 1800s Philadelphia Lukens/Kunz school of airgun design.
Note absence of a sighting groove on the receiver. The indentation along
the rear of the center fusion line reveals that the receivers of the
Lukens/Kunz airguns are too thin to allow milling of sighting grooves -
they must be cast in. Photo/Tom Gaylord.

Fig. 7.Lukens DNH air rifle. Top
view showing hammer with firing lug after it has passed over the air
release lever which is just to the right of the midline of the receiver.
Note the almost perfectly aligned witness marks on the barrel and
receiver indicating an excellent match of barrel and receiver. Photo/R. Beeman,
©2001
Robert David Beeman.


Note developing crack in the Lukens Sellers
gooseneck hammer.


Figs. 8 - 11. Four views of the Lukens Sellers air rifle.
The underside view shows the handsome cast brass trigger guard, keyed into the
receiver halves at the back and secured by two screws in front. The Lukens DNH rifle also has
this styling. VMI photos.
Click on blue border images for slightly larger views.
A gooseneck hammer (fig. ) seems to be basic
to the Lukens/Kunz Kentucky style air rifles. The Lukens Sellers airgun
has a gooseneck type of hammer (which shows a fracture line across it).
Four
other air rifles ascribed to Lukens, but outside the VMI museum, have
gooseneck hammers. Four other “Kentucky style” air rifles, the
lockplates of which are marked Kunz, have an identical type of firing
mechanism and both have the gooseneck type of hammer. Thus, it is most
puzzling to see the rounded double neck, military style hammer on just
one Lukens air rifle.

Fig. 12 Lukens DNH air
rifle. Right outside view of lock with "flint" clamp removed. Photo/R.
Beeman, ©2001
Robert David Beeman..

Fig.13. Lukens DNH air
rifle. Inside view of lock mechanism showing removed flint clamping
plate (inside view - note pits into the metal to improve the grip on the
flint or firing lug), firing lug, and clamping screw. Note especially
the bright finish on the mainspring which appears to be a replacement.
The clockmaker style firing lug return spring, typically found in
Lukens/Kunz airguns and prone to "escape", is missing. Note
also that the Lukens name is also stamped on the inside of the lock
plate. Photo/R. Beeman.©2001
Robert David Beeman.
The Lukens air rifle with the double neck hammer is
conspicuously
marked Lukens in large engraved script, both inside and outside of the lock
plate. The only other markings easily evident on this gun are the
letters “Phild-a.” on the left side of the receiver (fig. 3) and a ring
of encircled dots which surround the muzzle opening (fig. ). The
other Lukens air rifle, noted earlier, is marked with C. Seller’s name
and his early Philadelphia address on top of the barrel and Lukens on the lock plate.

Fig. 14. Muzzle of Lukens DNH
air rifle showing circled dot markings and land and groove rifling. Photo by
Tom Gaylord
(click on
image for larger view)
Of the three Lukens/Kunz air rifles examined closely, we
found all three to have receivers different in size, features, and
proportions. All show clear evidence of careful, integrated design and
skilled assembly. They have three different combinations of lock plate
attachments. There is absolutely no indication that these airguns, or
any of those of the series which followed them, were improvised from
previously existing guns. Careful examination of the photos (figs.
) will show these features. All three had a forward securement screw.
The Lukens DNH rifle had a rear flange that fitted under the edge of the
receiver. The Lukens Sellers rifle has no flange, but has a screw near
the middle of the lock, which secures the plate to the receiver. The
Kunz .32” caliber air rifle has a rear flange and both a middle and
forward securement screw. This would appear to be an evolutionary
series: the Lukens DNH gun has the loosest, least secure arrangement of
the examined guns. I
have not been able to examine this arrangement on the Copper Lukens.
The Lukens Sellers rifle substitutes a middle screw for the rear flange
and thus allows the plate to be securely screwed down. The Kunz rifle
has all three, a rear flange for securement and to facilitate alignment
of the plate when securing it, plus a solid middle and forward screw for
very secure attachment of the lock plate. It is my conclusion that the
Lukens DNH rifle is the oldest of these three and that the Kunz rifle is the most highly
evolved; the most recent production of the series. It is very
probable that these particular Kunz rifles were made after Lewis
departed on the expedition in 1803. The Lukens DNH rifle seems to have
been one of at least two Lukens air rifles that existed in time to be the airgun available to Captain Lewis for his “Voyage of
Discovery” across America. Almost surely, one of those, the
"Copper Lukens" air rifle, not yet examined, is the first of the known
specimens of Lukens air rifles.

Fig. 15. Lukens Sellers
air rifle. External view of complete lock mechanism. Note gooseneck
hammer with firing lug inside the jaws of the flint clamp. Photo by R.
Beeman, ©2001
Robert David Beeman.

Fig.16 Lukens Sellers air
rifle. Internal view of complete lock mechanism. Note the squarish,
"clockmaker's" style mainspring. Photo/R. Beeman.©2001
Robert David Beeman.

Fig. 17. Kunz .32" caliber air
rifle. External view of lock mechanism with firing lug removed. Note
gooseneck hammer and stop spurs on the firing lug. Photo/R. Beeman.©2001
Robert David Beeman.

Fig. 18. Kunz .32" caliber air
rifle. Internal view of lock mechanism with firing lug removed. Photo/R.Beeman,
©2001
Robert David Beeman.


Fig.
19 -20. The
"sliding birdcage" valve assembly of the Lukens DNH airgun reservoir is a
complex appearing device to do the critical job of sealing in the stored
air. Actually, this is a simple variation of the basic air valve
design
found in
most
butt reservoir airguns of the previous century or two (and in the
various, very different, valve units of the Girandoni-type airguns where a central, non-adjustable valve shaft was contained within a
central coil spring and housed in a tubular or conical outer housing).
The Lukens valve seems to have been made up from
the type of plates,
bolts, and springs that would be common in a clock-maker's shop. The
"birdcage" assembly simplified construction by avoiding the need to cast
a valve housing. This simple modification also represents a one step improvement in
that it
provided adjustability of valve compression, preload and travel while the
basic airgun valve system is not adjustable. Note in the lower view of
the removed valve assembly that one of the four support shafts appears
to be broken off at the nut.
Photo/R. Beeman, ©2001
Robert David Beeman.

Fig. 21. Lukens DNH air rifle. Top
view of the air reservoir showing the forward tip of the stem of the
intake/exhaust valve. The pin shown in the center of the figure
below pushes back on
this stem to cause a momentary burst of air for firing. The valve seat,
around the pin, probably was made of horn or "jacked" leather.
Such air reservoirs, of buttstock, conical, and semi-conical shape had
been common for at least a century or two. This buttstock reservoir
seems to show advancement over a previous Lukens reservoir (in the
"Copper Lukens") by adding a cheek comb along its top edge. Photo courtesy of VMI.

Fig.
22. Lukens
DNH air rifle. Detail of receiver end of valve assembly, showing valve
stem. This unit screws to the butt reservoir via the female threads seen
in the image to the left. Photo by Tom Gaylord.
The dating of the
double neck hammer (figs. ) on the Lukens DNH airgun must be
considered. A flintlock rifle hammer was just too large for the role; a
pistol hammer would have been ideal. Stewart and Harrison felt that the
double neck hammer on this gun was from a U.S. Model 1836 flintlock
military pistol and thus that this hammer must have been added after
1836. This evidently was the primary reason why Stewart had definite
doubts that the Lukens DNH airgun really was the Lewis and Clark airgun.
Double neck hammers of this rounded type are found on American, and
even French, flintlock firearms which were built prior to 1800.

Fig. 23.
Double Neck Hammer of the Lukens DNH air rifle. (Height of the main
hammer piece is 1.582": upper flint clamping plate is 0.695" by 1.033";
total length of screw is 1.305"). Note that upper flint clamping plate
is shorter than the lower plate. Photo/Virginia Military Institute.
What could have been the source of the replaced DNH
hammer? Colonel Gibson, the VMI Museum Director, noted (personal
communication, 16 October 2000) notes that French gun parts would have been
available from French trade with the Native
Americans who already had flintlock firearms or they could have been
obtained in the region's predominately French towns. A likely source candidate is the French Model 1777
flintlock pistol. Perhaps an even a better candidate is
the U.S. Model 1799 North and Cheney (Berlin) flintlock pistol. This
large "horse pistol", the really first official U.S. pistol, was modeled
on that French M1777 pistol. Garavaglia and Worman (1998) and Frank
Tait both note that there were a large number of M1799 North & Cheney
pistols available in the appropriate time window, at least at the
Schuylkill Arsenal in Philadelphia.

Click on pic for larger image
Fig. 24. U.S. Model 1836 Military
Flintlock Pistol.
After
Garavaglia and
Worman (1998)

Fig. 25. French Model 1777 Military
Flintlock Pistol
After
Moore (1967)
Could a M1777 or M1799 pistol, or a replacement part in
the spare parts inventory, have supplied the replacement hammer on the
Lukens airgun? The replaced double neck hammer ("double throated cock")
on the Lukens air rifle seems to match the proportions of the North and
Cheney flintlock pistol quite well but not match the proportions of the
M1836 hammer in the specimen shown by Garavaglia and Worman (1998).
Comparing rough measurements of the height of the hammer from its base
to the top surface of the lower jaw to the width of the hammer base :
North & Cheney height = 190 %, Lukens DNH = 180 %; N&C width = 84%,
Lukens DNH = 79%. The height is 223% of the width for both guns! The
M1836 hammer has a much broader base, with a width to height ratio of
2.09.
The head of the hammer pivot screws on both the Lukens
DNH rifle and the N&C pistol are much smaller than the head of this
screw on the M1836. The head of the hammer pivot screw of the N&C pistol
is about 57% of the hammer's width; the screw head on the Lukens DNH gun
is about 50% of the hammer's width. The same screw head on the M1836 is
only about 36% of the hammer's width. An imaginary line down the back of the lower member of
the N&C and Lukens DNH hammers is almost in line with the rearmost curve
of the hammer's base, while in the M1836 the rear curvature of the base
projects well behind such a line.
Thus, while the
hammer of the Lukens DNH air rifle differs significantly from that of a
U.S. Model 1836 hammer, some hammers of the Model 1799 North
& Cheney and Lukens DNH hammers seem to be similar enough that they
might have been interchanged, with some fitting, to operate on either
gun.
However, the hammers of some North and Cheney pistols
have quite different shaping. Ernie Cowan (personal communication, 20
November 2004) feels that the hammer on the Lukens DNH rifle better
matches that of the Waters and Johnson flintlock pistol of 1836.

Click on pic for larger image
Fig. 26. M1799 North & Cheney Pistol -
from Reilly (1986)
A difference from
the M1779 hammer, in
this very limited comparison, appears to be the presence of a concave
area in the Lukens DNH hammer around the opening into which the clamping
screw protrudes. Such a concave area does not appear on the hammer of
the M1799 North and Cheney pistol illustrated by Garavaglia and Worman
(1998). The original French M1777 pistol, from which the M1799 North and
Cheney pistol was copied, as illustrated by Moore (1967), shows exactly
the same concave area as the Lukens DNH rifle’s hammer. The cock/hammer
of the North and Cheney pistol illustrated by Reilly (1986) does show a
concave area like the Lukens DNH hammer it and appears to be almost
identical to the DNH hammer. Other flintlock pistols by North had such
a concave area in DNH models by 1816 at the latest. It seems probable
that such a concave area also was present in at least some earlier guns
made by North. Tait points out that in that period, gun locks, including
the hammers, were made by independent filers, not by the gunsmiths.
Different independent workers would be expected to make slightly
different sizes, sometimes appearing quite different in cosmetic features but similar in style and
proportions. The actual differences in gross outside dimensions and
cosmetics could be due to differences in hand trimming and finishing,
even if the rough blanks had been the same and there is no assurance of
that. (Garavaglia & Worman (1998) report that the first U.S.
governmental contract to require lock parts to be interchangeable was
for the U.S. Model 1813 pistol.)
At this time it apparently is not known just what type of
locks were on the fifteen firearm rifles that Lewis obtained from
Harpers Ferry Arsenal when he arrived there in mid-March 1803. Tait
(1999) ended his paper on the U.S. Contract Rifles of 1792, by
lamenting that we still don’t know what kind of locks were present on
those firearms. Captain Lewis may have ordered his firearm rifles to be modified for his group.
There is no doubt that the double neck style of hammer is more durable
than the gooseneck style hammer. Tait (1999) illustrates double neck
hammers, without comment on the design, on 1805 Harper Ferry rifles,
confirming that that style was present in that period. The journals
indicate that Lewis ordered new locks to be made
to fit his rifles and the journal entries indicate that these locks and,
and their parts, were basically interchangeable.
It
seems quite clear that the hammer that was standard in the Lukens/Kunz
design was a flintlock gooseneck hammer that holds a specially keyed and
pivoting striker lug instead of a flint. It is significant that it is
presently observable that a previously installed, probably gooseneck,
hammer had already left its mark on the top edge of the lock plate of
the Lukens double neck hammer air rifle. The double neck hammer on this
gun clearly is a replacement. The most likely situation is that such a
replacement would have been the result of a quite skilful, repair. The
fitting of both a different style hammer and a new mainspring calls for some careful metalsmithing.
Given a bellows,
a simple drill, some files, and steel stock, a practiced and clever
craftsman can make even rather sophisticated flatsprings - and could
adapt a different hammer. (It is
generally impossible to repair and retemper a mainspring. "Repairing" a
mainspring means completely replacing it.)
Only
someone with the original gooseneck hammer and firing lug in
hand, could have fashioned this hammer replacement. If the firing lug of
the Lukens DNH airgun is not one made by Lukens, it is an exact copy.
It may be the original lug, salvaged from the original hammer.
There is another little noticed feature of the lock
mechanism on the Lukens DNH air rifle. That is, the head of the forward lock plate securement screw
of the left lock plate (fig. 2) is broken so badly that it is difficult
to remove. This flaw would be very conspicuous to any gunsmith. How
could it have become broken? Only someone trying to remove the lockplate
could have broken it. One likely scenario would be that it was broken
when someone removed the lockplate to replace a broken mainspring. While
Shields had all the simple equipment that would have been necessary to
replace the mainspring, or even the hammer, it would have been very
unlikely that the expedition’s equipment included the tools necessary to
make a new screw and it is just as unlikely that their spare parts would
have included a screw of the exact configuration and thread to match
that particular “civilian” screw originally used by Lukens. Shield’s
only choice would have been to secure the lockplate with the broken head
screw when he finished his lock repairs. However, this screw could
have been broken anytime in the 19th or 20th century.
All of the known Lukens/Kunz air rifles have
riflestock-shaped butt reservoirs of apparently very similar
construction (fig. ). Colonel Gibson and I have closely examined only
the reservoir of the Lukens double neck hammer air rifle. The reservoir
has an internal volume of 590 cc, of which 83 cc is displaced by the
valve mechanism. Thus the net air capacity is 507 cc (=30.9 cu. in.).
The reservoir is made of two overlapping iron plates. The main body of
the reservoir consists of a single piece of metal that has been bent and
hammered into the shape of a buttstock. This metal sheet is overlapped
and welded to form a seam about one inch below the crest of the comb on
the right side. The second plate of metal is welded into the rear of the
larger, somewhat oval shaped tube formed by the first piece forms the
buttplate section. There may be rivets concealed within the welds, but I
do not think so. There is an internal baffle, quite difficult to see in
the interior of the reservoir, which is darkened by a complete inside
coating of what appears to be old dried grease. (A lining of grease in
such guns served to trap small debris and dirt that may be introduced
into the reservoir during pumping - thus increasing the dependability of
the valve.) This baffle serves a cross brace, between the inside sides
of the reservoir, and could significantly increase the amount of air
pressure that this vessel could hold. Extensive signs of brazing are
also present - perhaps to secure the cross braces and/or as suggested by
Wolff (1958), to plug holes left after the welding. This butt reservoir
has such an unattractive rough and irregularly colored surface that it
is very possible that it originally was covered with leather, although
the air rifle made by Lukens for Sellers, and one of the Kunz air
rifles, have their buttstock reservoirs finished in black enamel. The
reservoir of the Lukens air rifle of the Man At Arms
advertisement, the "Copper Lukens", is unusual in being made of copper. It may have been an
even earlier product of the Lukens shop and probably was capable of
holding less pressure than the iron reservoirs. Such a version would
have been considerably less powerful and not very desirable for
expedition use.
The threads of the buttstock air reservoir of the Lukens
DNH airgun are especially interesting. The noted airgun maker, Gary
Barnes, was kind enough to examine them for me when the Lukens’ DNH
airgun was brought to the 1999 Roanoke airgun show by Colonel Keith
Gibson and George Whiting of the Virginia Military Institute. The male
threads of the receiver to the female threads of the valve body (figs.
8-9) are 12 TPI with a 60° pitch. The male threads on the valve to the
female threads in the butt reservoir (figs. 7, 10) are close to, but not
exactly, 16 TPI and close to, but not exactly, a 45° pitch. The
especially interesting part is that Gary thinks that the valve-to-butt
threads were cut on a different machine than the receiver-to-valve
threads. He noted that even on his modern lathe it would be wasteful to
cut such different threads. The set-up time would have been too great.
All of the cutting tools would have to be ground on a different angle
and all the lathe gears would have to be changed. A machinist usually
establishes a thread pattern and uses it consistently. Thus, at least
two lathes, perhaps in two different shops, were used. This suggests
that the air reservoir was purchased from an outside supplier - further
easing the work and design efforts in the Lukens shop. The odd-sized
threads may have been a proprietary size that the maker had established,
not true to any English measurement.
The receivers (figs. ) of
the Lukens and Kunz air rifles are brass or bronze. Originally, Henry
Stewart and I felt that the shape and style of these receivers appeared
similar to receivers on “Girandoni-style”, Austrian butt-reservoir air
rifles. However, such styling was known in Europe by 1750, or even well
before, so it is possible that this
superficial styling could have found its way to America by the end
of the 1700s. The butt reservoir construction, with conical,
semi-conical, and buttstock shapes, was, of course, known for at least
the prior two centuries. Close examination of specimens of Girandoni and
Girandoni-style air rifles in the Beeman collection reveals that while
there is superficial external similarity due to being rounded, as is so
common, and having the air reservoir connection, barrel base, and lock
in similar locations, as would be dictated by function, the receivers of
the two lines of airguns really are extremely different. The Lukens
receivers consist of a pair of vertically fused metal castings, each
cast (probably by rammed sand casting) from side to side, which
enclose the lock and associated parts, both top and bottom. The air
transfer tube appears to have been brazed in place when the receiver
shells were joined. The Girandoni locks and associated parts are covered
by a single piece metal receiver which is solid only on the top of the
receiver; the areas under the locks are covered by the trigger guard and
parts of the wooden forearm. The air reservoirs are similar only in
position and function. Internally the Girandoni airguns and the Lukens
airguns are completely different in design, each following designs known
for over a century. There appears to be not the slightest indication
that the features of one was influenced by the features of the other.
The mainspring (fig. ) in the Lukens
airgun which bears the name of Coleman Sellers on the barrel appears
less sophisticated than the Kunz .32” caliber air rifle’s mainspring
(fig. ). The Lukens’ Sellers mainspring has square,
unfinished edges, is less tapered, and has longitudinal draw file marks.
It gives the impression of being the kind of spring that an early
clockmaker, rather than an experienced gunsmith, would make. Kunz, as he
shifted from being the Philadelphia agent for the Lukens shop to being a
sophisticated gunsmith well recognized for both firearms and airguns,
may have been the one to bring more refined gunsmith skills to the
Lukens shop. The Kunz mainspring, certainly more recent and more
refined, is more graceful with beveled edges and a more finely finished
surface. The mainspring in the Lukens DNH air rifle indeed seems to be a replacement
(fig. ). It has a bright blue temper and is beautifully tapered with
nicely beveled edges. This mainspring looks virtually new and shows no
surface rust, as if it had been made shortly before the gun was retired
from active use or perhaps later.
The barrel on the Lukens DNH air
rifle is brass, or perhaps ordnance bronze, 32" long, and rifled with 15
(not 17 as noted by Wolff, 1958) shallow rifling grooves. At the muzzle
the rifling appears scalloped due to finishing with a very small round
file. Each groove is tapered out and given a rounded bottom. This
tapering would facilitate loading and reduce accuracy problems due to
muzzle impacts. Within the bore the rifling lands have broadly angular
shoulders sloping into the grooves. The rifling has a very long right
hand twist: one turn in 40 inches and the bore is .31" caliber. Stewart (1982) indicated that such a gun
would use an unpatched ball. The many, shallow rifling grooves evidently
would have rendered a patch, or hard ramming, unnecessary. (For
comparison: The Kunz .32" caliber air rifle had even shallower rifling
grooves, also with a long right hand twist, one turn in 46 3/4 inches.
As noted earlier, the muzzle of the Lukens DNH air rifle bears a ring of
circled dots (fig. ), simple, whimsical decorations
which enhance the airgun's similarity to contemporary, powder-burning,
Kentucky rifles.
The pump for the Lukens double neck hammer air rifle is
missing. However, considering the similarity of the known Lukens/Kunz
air rifles we can certainly expect that the pump for one of these air
rifles very probably would be very similar to the pump for another of
them. We are extremely fortunate to find that the one of the Kunz air
rifles is cased with an air pump (figs. )
and a pump is known for one of the unrecorded Lukens air rifles.. These
pumps are unusual; the
design may be truly unique among all other known airgun pumps, in that
they are provided with a tapered, coarsely threaded auger screw at the
end which is to be restrained during the pumping. To use such a pump,
the shooter could screw it into a tree, a wooden floor, a door jamb, a
barn wall, or any similar surface, and then apply the pumping strokes -
even at convenient shoulder height. It is only right to suspect that
these pumps
probably have very similar specifications to the pump for Lukens’ DNH air
rifle. And, it is possible that the missing pump for the DNH air rifle
had such an auger screw. However, convenient trees would have been
expected through only some parts of the trip. The pump for this Kunz air
rifle is 22.63” overall, with a cylinder 19.50” long and with an outside
diameter of 0.82”. The pump’s piston head (fig. ) is 0.75” in diameter
and 2.50” in length and consists of a stack of washers, apparently made
of oiled leather, compressed against a steel end piece honed to an
almost identical diameter.


Fig. 27. Kunz air rifle pump.
This pump was found cased with a Kunz combination percussion/air rifle,
VMI museum no. 88.031.012. The buttstock air reservoir would be screwed
onto the threaded end of the pump. A coarse threaded auger screw with
finger flanges, fitted to the end of this pump, allowed the shooter to
anchor the air
pump to a tree or a post,
The whole unit of connected pump and reservoir would be pumped up and
down many times to build up a full charge of air.
. The pumps that
accompanied Lukens guns may have also have had an auger screw but more
likely were fitted with a T handle.
Lower image shows
the piston head of the Kunz air pump consisting of stacked leather
washers behind a tightly-lapped steel head that originally probably had
a leather tip Photo/ Virginia Military Institute.
Gaylord (1998) reported that one should be able to
calculate the maximum pressure for a single stage airgun pump by
dividing the weight of the shooter by the area of the piston head.
Gaylord noted that Dennis Quackenbush, who weighed about 220 pounds when
testing another airgun pump with the same piston diameter, was capable
of generating a stored air pressure of about 500 psi. I don’t have any
information on Captain Lewis’ physical features other than his cousin’s
remark that he “looked like Napoleon and was bow-legged”.
However, he must have been in really excellent condition and possibly
was able to “rap” more air into an air reservoir than would be expected.
Gaylord suggests that even at only about 500 psi, a .32” caliber
airgun with a timed valve, such as that found in the Lukens guns,
probably could be made to fire as fast as 700+ fps. Perhaps with extra
strength and practiced technique, such as carefully developed “pump
rapping”, Lewis may have been able to push his airgun to pressure levels
somewhat higher than the above modern day tests would indicate, but
this would not have been necessary. Rapping in air vs. pushing it in can
be compared with hammering in a nail vs. pushing it in with a hammer. For
many years I have been "rapping" higher pressures into Yewha and other
pneumatic guns than could have been predicted on the basis of my
tenth-of-a-ton weight.
(Both Barnes and Gaylord, have since reported -via personal
communication of October 20, 1999 - that such "rapping" can indeed
produce air storage pressures greater than would be predicted from the
body weight of the shooter. The upshot is that the weight of the shooter
may be almost irrelevant with the type of hand pumps involved.)
Could such a .32” caliber airgun be useful on an
expedition such as the Lewis and Clark trip? Today we use airguns, with
calibers as low as .177” and .20”, and of considerably lower power, for
effectively hunting small game. Could such guns be lethal to a deer or a
threatening human? I know of several verified incidents of adult deer
being killed with a single well placed head shot from .20” and .25”
caliber Beeman R1 air rifles; modern airguns which have less than about
one-half the suspected power of the Lukens air rifle. I once testified
in an accident case where a very light .174” BB (only 4.3 grains) ,
coming from a modern BB rifle at about 700 fps, killed a young boy,
several yards away, by penetrating the skull behind the ear, going all
the way through the brain and then rebounding off the opposite inside of
the skull back into the brain. An airgun, such as the Lukens gun, would
have been more powerful and should have been very useful in gathering
pot meat, of very limited value as a large game/defense gun, and of
great value in impressing the Indians. All this, without damp powder
misfires or any expenditure of gunpowder! However, the Lukens airguns do
appear to be marginal in power for a wilderness expedition.

Fig. 28. Front sight of
the Lukens DNH air rifle.
Courtesy of Martin Orro and Hank Elwood.
The iron rear sight of the Lukens DNH air
rifle has been made fast into the rear sight slot.
Martin Orro and Hank Elwood (personal communication 26 September 2004) have noted that
the front sight of the Lukens DNH gun apparently is mounted backwards,
with the blunt side forward - opposite the typical arrangement of
contemporary Pennsylvania rifles and other Lukens guns. Tiny distortions
of the front sight dovetail slot indicate that the sight had been
forced in hard, with pounding marks, evidently from an improvised tool,
on the left side.
Before leaving our consideration of the Lukens and Kunz
air rifles, it may be useful to future researchers to record some
additional data on some of the air rifles known from these makers for,
as noted by Henry Stewart, these guns seem to represent a distinct
school of American airgun design. As noted, most of the presently known
specimens of Lukens and Kunz air rifles are in the Stewart collection at
Virginia Military Institute.
Kunz and
Lukens Air Rifles in the H. M. Stewart/VMI Collection
Information compiled by George Whiting and Keith Gibson, 23 NOV 1999