1) Axillary Thermometer, second half 19th century, unsigned. This bent arm axilla (underarm) thermometer is 5-3/4″ (15 cm) overall, with scale (95 – 110 F., by quarter degrees) hand-engraved directly on the glass and with bold hand-engraved numerals. Condition is very fine, complete with the original shaped case (rubbed and lid detached). This transitional form must follow shortly after that with an attached calibrated plaque (see Tesseract catalogue 106 item 47). $250.
2) Petit Screw Tourniquet, c. 19th century, unsigned, constructed of brass with long screw and canvas strap, this is a good example of the screw tourniquet developed by Jean Louis Petit c. 1720. $295.
3) Attractive Spring Lancet, probably German, c. 1800, the brass body 1-5/8″ (4 cm) long engraved both sides with rather unique foliage, and fitted with steel blade and nicely shaped iron cock and trigger. Fine noting some oxidation, complete with its leather bound case. $450.
4) Three Blade Fleam with Hidden Lancet, 19th century, signed “G. Gregory, Cast Steel” on a blade. Measuring 3-1/4″ (8 cm) long closed, this finely crafted fleam has a body clad in beautifully grained horn, three cut shaped steel blades in graduated sizes, and, in a rather hidden slot, a small steel scalpel with brass handle. Condition is fine, with light surface oxidation. It is held within the early shaped and decoratively patterned case of leather-bound card. A similarly signed fleam is in the NMAH. $495.
5) Trocar & Cannula, c. 19th century. A fine 5-1/4″ (13 cm) long pocket case of turned ebony has screw-on caps at each end. The thin tapered cover comes off to reveal the polished steel trocar with shaped point; the top unscrews for access to the silver cannula which slides onto the trocar. Very fine condition throughout. $225.
Ask the Dealer
David and Yola Coffeen both have enjoyed academic careers, as planetary astronomer and as linguist/educator. But since 1982 (yes, 1982!) they have been full-time dealers in early scientific and medical instruments, under the name Tesseract. Selling primarily by catalogue (over 100 issued so far) they also have a web presence at www.etesseract.com, and can be contacted at firstname.lastname@example.org.