Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 426
ted,but the operation requires frequent repetition. The cellsconsist of pine boxes of the size mentioned lined with guttapercha. The operation of lining is quite simple, and thecell, if well made, is durable. A wooden form is made whichis the thickness of the gutta percha smaller than theboxes.… … Forming the Gutta Percha Lining. A piece of gutta percha of suitable width and length isplaced upon the form within the projecting edges of the sheetalread} in position. The edges are then warmed suffi-ciently to render them adhesive, by means ol a lamp flameor by holding a hot iron near enough to…
Physics · Lantern projection · Electric apparatus and appliances
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