UNCOMMON ALL-BRASS SLIDE RULE

UNCOMMON ALL-BRASS SLIDE RULE

Stock Number: 9278

$1500.

For sale, antique brass slide rule, with a non-tarnishing gray finish. It has reversible slider, and is finely divided with logarithmic and trigonometric functions. Contained in its original case. it is mid-19th century and probably by Richer.

Dimensions

17 inches (43 cm) overall

Circa

c. mid-19th century

Country of manufacture

France

Category: Calculating

Description

UNCOMMON ALL-BRASS SLIDE RULE, French, mid-19th century, unsigned but probably by Richer, stamped on the case “Règle Logarithmique.” Measuring a full 17″ (43 cm) overall, this substantial rule is made of solid brass, apparently, with a heavy non-tarnishing gray finish. It has a reversible slider, all precision divided with logarithmic “Nomb.” scale, and with transcendental trigonometric functions “Sinus,” “Tang,” and “Caract” scales. Condition is very fine, complete with the original leather covered wood case, the ends notched for use of the calculating rule in place.

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US TESSERACT

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 mail@etesseract.com.

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