National Museum of American History
Amsler Type 2 Polar Planimeter
Amsler, Jacob · ca 1925
This German silver instrument has a 6-1/2" arm with tracer point and 6-1/2" pole arm. The arm lengths are fixed. The tracer arm and pole arm are connected by a hinge and form a circle around the white plastic measuring wheel, vernier, and registering dial when the instrument is closed. The pole weight is missing. The top of the tracer arm is marked in script: J. Amsler. A serial number is marked underneath the tracer arm and the weight: 67925.
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