Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 514
. As the design of this machineis such that the field magnet may be connected with a bat-tery, so that all of the current from the armature may beutilized in the external circuit, instead of allowing a portionof it to pass throvigh the helices of the magnet, two extrabinding posts, u v, and a… … connected by the wire, /■, with the binding post, :■: the com-mutator spring, /, is connected with the SAvitch, N, by thewire, /. The switch button, r. is connected with the bindingpost,/, by a suitable wire, and the switch button, .?, is con- 492 EXPERIMENTAL SCIENCE. nected with the binding post,…
Physics · Lantern projection · Electric apparatus and appliances
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