Instruction Card for Robertson-Amsler Polar Planimeter

Description
These salmon-colored card fragments were received with MA.333766. They give partial instructions for taking measurements with an "averaging planimeter." The reverse side of the card has a drawing of a connector for a steam engine indicator and several user testimonials.
Location
Currently not on view
date made
ca 1900
maker
James L. Robertson & Sons
place made
United States: New York, New York
Physical Description
paper (overall material)
Measurements
overall: 8.5 cm x 9.5 cm; 3 11/32 in x 3 3/4 in
ID Number
MA.302380.02
accession number
302380
catalog number
302380.01
Credit Line
Gift of R. J. Russell
subject
Mathematics
Engineering
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Planimeters
Data Source
National Museum of American History, Kenneth E. Behring Center

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