Technical supply co., Scranton. [from old catalog] · Scranton, Pa., Technical supply co · leaf 362
4112 4112. Compensating Planimeter, German silver and brass; adjust-able tracer arm fully graduated, improved pole weight, testing-rule and table of settings for United States standard measure,with directions, in case each, $36.00 4114. Compensating Planimeter, like No. 4112, but with adjustable… … 4115 4115. Suspended Ball Planimeter, German silver and brass; tracerarm is Hi inches long; pole arm, 6i inches long; and diameterof the toothed circle on the pole, 6i inches long. The angularmotion of the tracer arm is about 90°. Surfaces from 2^x4 in. to7 X 10 in. can be measured without moving…
Engineering instruments · Drawing instruments
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