Spring lancet, patent model, 1857. Lancet has a cupped end instead of the usual knob end. According to analysis by the Conservation Laboratory, the lancet is made of silver-copper alloy. A screw on the back regulates the depth of cut by moving the spring mechanism back and forth inside the outer casing. Patented by James W. W. Gordon (U.S. patent 16479). Transferred from the U.S. Patent Office 1926. L 36 mm, W 25 mm, H 6 mm. Neg. 73-10318 (BW) and 73-116 (CS), front view; 73-10319 (BW) and 73-11147 (CS), back view. NMHT 89797 (M-4298). (Figures 48, 49.) Spring lancet, 19th century. Lancet is brass and has a brass lever release. It is engraved with the initials "A. F." Donor claimed it was a 17th-century import from Wales, but it appears to be a standard 19th century lancet. Donated by Edward Pryor 1930. L 45 mm, W 19 mm. Neg. 73-4235 (BW & CS). NMHT 112827 (M-2995). (Figure 105.) Spring lancet, 19th century. Lancet is brass with a brass lever release. Engraved "Wiegand & Snowden/Philadelphia" (manufacturer). Donated by Dr. H. S. West 1934. L 44 mm, W 22 mm. NMHT 131386 (M-3636). Spring lancet with case, 19th century. Standard 19th century lancet with typical case made of wood, covered with brown leather and lined with chamois. Case closes by a latch, and is stamped "Traunichtessticht," which translates, "Do not trust, it stabs." Many 19th century cases were stamped with this motto. Donated by Fred G. Orsinger 1937. Lancet: L 41 mm, W 20 mm. Case: L 71 mm, W 35 mm, H 18 mm. Neg. 73-4237 (BW & CS), without case. NMHT 145365 (M-4510). Spring lancet blade with case, 19th century. The case is made of wood and covered with red paper, and has "F D" stamped on the bottom. A piece of paper with the date "1877" is affixed to the top of the case. This is the date that the donor received the blade from his mother, daughter of the owner, Dr. Joseph S. Dogan (1793-1870), who practiced as a country doctor in South Carolina. Donated by B. F. Arthur 1937. Blade: L 42 mm. Case: L 64 mm, W 20 mm, H 15 mm. NMHT 145290 (M-4513). NOTE: In the Wellcome Museum there are two spring lancets in a case. (R 3689/1936) One of these is marked "F. D." and the other "Fischer Peter," which may indicate that this is the name of the maker of all instruments so marked. The Wellcome instruments were part of the Hamonic Collections. Dr. Hamonic listed them as 18th century instruments. Another lancet that appears to be veterinary, because of its size, is stamped "P. Fischer" (Wellcome 13516). Note that several items in this catalog are so marked.