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Vintage_Gelman Instrument Polar Planimeter - Made in Germany - - $40 (Dundalk)

condition: like new
make / manufacturer: Gelman
model name / number: 62924
size / dimensions: 9 x 3.5 x 2
Gelman Instrument Polar Planimeter - Made in Germany -

A great gift for the mathematician, surveyor, calculus teacher in your life...a fantastic and beautiful conversation piece.

Vintage Polar Planimeter by Gelman Instrument Co. Made in Germany, in a hard green leather case with velvet liner. Box measures 9 x 3.5 x 2 in.
A planimeter is a table-top instrument for measuring areas, usually the areas of irregular regions on a map or photograph. They were once common, but have now largely been replaced by digital tools.
Set contains a ship designers polar compensating planimeter for measuring the displacement of sail areas.

post id: 7750911842

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