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2020-11-06 17:06:10
Fuller, John E. ; Palmer, Aaron
Fuller's Time Telegraph and Palmer's Computing Scale [ Full Size ]
John E. Fuller, Massachusetts, 1846. A rare circular slide rule. 11 1/16 inches by 11 1/16 inches by almost 5/16 inches thick. Constructed of three layers of book board, the center board intact, the outer two boards with circular volvelle cutouts, the whole connected with a center metal rivet and decorative gilded leather affixed around the assemblage edges. Each side is covered with a lithographed sheet, with a circular cutout for the inside and outside of the volvelle scales. The top board, containing the volvelle "Palmer's Computing Scale" notes it was engraved by George G. Smith, 186 Washington St, Boston. It also has a deposit (Entered according to Act of Congress) notice dated 1843 by Aaron Palmer in the Clerk's office of the District Court State of Massachusetts. This volvelle has the original recessed metal ¾ inch finger disk used to move the rule. The rear board contains "Fuller's Time Telegraph" with a deposit notice of 1845, by John E. Fuller, in the State of Massachusetts. Also "Eng'd by GG Smith, Boston". There is also a previous owner name "L Derr" inked in the center. This side also has the original ¾ inch finger disk for movement. Both volvelles rotate as they should, but the Palmer side is curled outward from the flat plane, a common failing with these devices. Uniform darkening/soiling to both sides, some minor loss to the decorative leather mostly at corners. Lacking the often missing cloth portfolio cover and instructions. Boards. Palmer's Computing Scale is one of the most desirable artifacts for those who collect early American Slide Rules and calculat … [Click Below for Full Description]
Bookseller: Kuenzig Books ( ABAA / ILAB ) [Topsfield, MA, U.S.A.]
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