Technical supply co., Scranton. [from old catalog] · Scranton, Pa., Technical supply co · leaf 158
f^ … ij 1350 1350. Ivory Rule, 2 feet, four fold; German-silver mounted, divided >^,^lo, -142, ViQ inch; outside edge foot in lOOths. The inside degreesare beveled and divided Vie, %, %6, Va, H, >^, Vs, H, Vs, h ^Va, 1^inches to the foot. The main joint is graduated to 5 degrees, forsetting off…
Engineering instruments · Drawing instruments
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