-40%
Antique Cased Keuffel and Esser Co. No 4212 Planimeter Instrument Tool LOOK
$ 33.79
- Description
- Size Guide
Description
Antique Early 1900sKeuffel & Esser Co N.Y.
No. 4212 Planimeter
The Planimeter is a tool for measuring the surface area of any two dimensional shape. The Swiss Mathematician
Jakob
Amsler-
Laffon
built the first modern planimeter in 1854, the concept having been pioneered by Johann Martin Hermann in 1814. This Planimeter is complete in its original case. The case measures 2 1/2 inches by 6 1/2 inches and is in very good problem free condition.
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