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Object Record

Catalog Number 89.0001.141
Object Name Planimeter
Title Keuffel & Esser Planimeter (small)
Description Metal with black enamel and stainless steel. Planimeter has white dials and guide pin. Extension arm has K&E mark in white.
Jakob Arnsler, professor of mathematics at the University of Scaffenhausen in Switzerland

89.0001.141.01 - Keuffel & Esser Planimeter
89.0001.141.02 - Extension Bar
89.0001.141.03 - Metal Measurement Guide Pin
89.0001.141.04 - Black Leatherette Case
Date circa 1930
Accession number 89.0001.141
Caption Keuffel & Esser Planimeter
Catalog date 2004-03-30
Catalog type History
Provenance From exhibit text: "Engineers and cartographers normally use planimeters to find the area of an irregular shape, such as the area of a city. Medical researchers also used this small instrument to measure biologic phenomena. Jakob Arnsler, professor of mathematics at the University of Scaffenhausen in Switzerland developed this instrument in 1854. It consists of two arms: one affixed to the page using a pin, the other containing a stylus used to trace around the unknown area. As the region is traced, a small wheel rotates against the paper, recording the area on a dial."
Notes Scientific Instruments, 1992-2004
Number of images 2
Updated 2017-09-08
Condition Very Good
NIH Property # none
Old NIH Property # none
Serial # 5665