Palmer's Computing Scale

by Aaron Palmer

$1,250 · Offered by Kuenzig Books

Massachusetts: Aaron Palmer 1843 but circa 1845 . A circular slide rule. 10 15/16 x 11 inches x 3/8 inch thick constructed from two layers of book board. The upper board with a cutout volvelle in a circular form attached to the rear book board with a metal rivet. Upper board with affixed lithograph to both inner volvelle and outer remainder, showing scales, decorative elements, and imprint information. 1/4 inch gilded leather trim affixed to the edges,

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