Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 482
d. The correctway to wind the wire is to take a sufficient length and windit from opposite ends on two bobbins. Wind the wire onceover the spool from one of the bobbins, then wind from theends of the coil thus formed toward the middle, first with wirefrom one bobbin, then from the other bobbin,… … Magnet and Switch. At I, Fig.440, is shown the completed magnet and its arm-ature. 2 is a detail view of the spool. 3 shows the coresand yoke, both in perspective and section, the sectionalview exhibiting the method of fastening the cores to theyoke by means of screws. 4 (Fig. 441) shows the…
Physics · Lantern projection · Electric apparatus and appliances
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