Technical supply co., Scranton. [from old catalog] · Scranton, Pa., Technical supply co · leaf 300
be obtainel with a 6 or 7 prismatic compass. As a thoroughly serviceable instrument it is worthy of special notice. It is not a complicated delicate instrument liable to derangement ordeterioration. There are no reflectors or mirrors used other than the prism, which isprotected and fastened in a… … 3564
Engineering instruments · Drawing instruments
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