Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 484
are readily bent and fitted oneover the other in succession, the inner one being fitted toand supported by a rectangular wooden block. When thecore has reached the required thickness, the layers of whichit is formed are fastened together by means of iron rivetspassing through holes traversing the… … Electro-Magnet Partly in Section. thread or shoe thread and afterward coated with shellacvarnish, which holds on the thread and assists in cementingthe whole together. The extremities, a a, of the core are filed off squarely.The yoke is clamped to the base, <-/, by the clip, c, made ofhoop iron…
Physics · Lantern projection · Electric apparatus and appliances
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