The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)
Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 287
to the ar-rangement in Fig. 225,are placed in a horizon-tal position, and heldfirmly to the base-board by two brass bands. The screw-cups, A D, receivenhe batteryconnections. From A leads a wire, connecting with the bandwhich supports the mercury-cup, C, while to D is soldered oneend of the inner… … 282 COMPOUND MAGNET AND ELECTROTOME. B. The bent wire, W, is arranged to vibrate up and down 0:1the horizontal axis, II, while its two points, at B and C, justdip into the mercury of these cups. The curved iron rod, R,attached also to H, is bent, so that its lower extremity shallapproach quite near…
Physics
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