Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 693
wooden box 10 or 12 inches long (a cigar box will answerfor the experiment), some pieces of glass or metal, and somepaper patterns or stencils. The box is provided with a clipat the back and a sliding clamp at the front for holding theplate to be engraved, and it may with advantage be fur-nished… … Simple Method of Engraving Glass and Metals. MECHANICAL OPERATIONS. 671 The glass or metal to be engraved is cleaned thoroughly,and to secure the best effects it should be polished. Apaper stencil of the desired form is fastened to the glass ormetal plate by means of mucilage of good quality.…
Physics · Lantern projection · Electric apparatus and appliances
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