Technical supply co., Scranton. [from old catalog] · Scranton, Pa., Technical supply co · leaf 361
4106. Polar Planimeter, German silver, for measurements with needlepole; tracer arm so arranged that it can be shortened or madelonger, and set in parallel position to axis of roller, with testingrule, in case each, $21.00 … 4108 4108. Polar Planimeter of German silver; the tracer arm is divided in2 millimeters and with proportion marks for any reduction scalesto be indicated at will. The sleeve on the tracer arm is adjust-able over the entire length of the tracer arm and has a vernier reading to millimeter. The…
Engineering instruments · Drawing instruments
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
