favorite
favorite
hide
unhide
flag

Posted

print

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

Vintage_Gelman Instrument Polar Planimeter - Made in Germany - 1 thumbnailVintage_Gelman Instrument Polar Planimeter - Made in Germany - 2 thumbnailVintage_Gelman Instrument Polar Planimeter - Made in Germany - 3 thumbnailVintage_Gelman Instrument Polar Planimeter - Made in Germany - 4 thumbnailVintage_Gelman Instrument Polar Planimeter - Made in Germany - 5 thumbnail
condition: like new
make / manufacturer: Gelman
model name / number: 62924
size / dimensions: 9 x 3.5 x 2
delivery available
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 They were once common, but have now largely been replaced by digital tools.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: 7717137818

posted:

updated:

best of [?]

loading
reading
writing
saving
searching