ent Office 1926. L 105 mm (to tip of blade), H 77 mm. Neg. 73-4210
(BW, CS). NMHT 89797 (M-4327). (Figure 24.)

Spring lancet with case, 19th century. Brass knob end lancet, a larger
version of the spring lancet used in human phlebotomy. Case is also
similar to the spring lancet cases for human use. It is made of wood
covered with brown leather, lined with chamois, and closed by a latch.
Case has a chalice decoration on top. Donated by Dr. A. J. Olmstead 1945.
Lancet: L 74 mm, W 38 mm. Case: L 133 mm, W 60 mm, H 33 mm. NMHT 171080
(M-6418).

Spring lancet, 19th century. Veterinary lancet similar to the previous
lancet except that the blade is larger and provided with a blade guard.
Blade guard can be set by a screw in order to regulate the size of the
blade. Stamped on back panel is "F. Leypoldt/Phila." This is presumably
the same Frederick Leypoldt who patented two scarificators, one in 1847
and one in 1851. Donated by the University of Pennsylvania 1959. L 74 mm,
W 34 mm. Neg. 76-7757 (BW, CS), compares lancet to one used in human
phlebotomy, NMHT 218383 (M-9256). (Figure 22.)

Spring lancet with case, 19th century. Brass knob end lancet with large
blade and blade guard. Lancet has a rim around the top and a lever release
molded to resemble a torch. Case is lined with black plush and covered
with black cloth. Purchased 1976. Lancet: L 85 mm (not including blade), W
40 mm. Case: L 142 mm, W 78 mm, H 39 mm. NMHT 316478.

Spring lancet with case, 19th century. Instrument is made of brass and has
a ball-shaped handle. The blade is double beveled, typical of blades for
veterinary bleeders. The ball handle contains a spring that is attached to
a small projecting cylinder with string tied to it. By pulling on the
string, one can pull the blade in, and by pushing a button one can inject
the blade. Case is made of wood covered with leather and is coffin-shaped.
Purchased 1976. L 95 mm (to tip of blade), D of ball 34 mm. Neg. 76-7750
(BW, CS). NMHT 321697.07. (Figure 104.)

Spring lancet with case, 19th century. Lancet is brass and has a
triangular shape. It is triggered by a slide catch on the front of the
instrument. The triggering handle is a detachable piece that lifts off a
square peg. Hinged from the side is a curved piece for ease in holding.
Screw on front of the instrument probably regulates blade depth and a
rectangular button at the top corner probably releases the blade.
Mechanism is jammed and the blade is hidd