Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 546
I^M^iife?^£ … Feedinsj Mechanism of the Wcstun Arc L:inii). the decreased liability of iiiinry ti) persons C(.)ming in contactwith the conductors. In Fig. 506 is shown a duplex or double carbon lampdesigned for all-nio;ht burnino-. The regulation of the arc iseffected in this lamp by a single electro-magnet, D…
Physics · Lantern projection · Electric apparatus and appliances
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