Practical applied electricity; a book in plain English, for the practical man. Theory, practical applications and examples (1911)
Moreton, David Penn, 1882- · Chicago, The Reilly & Britton co · leaf 306
294 1 ELECTRIC LIGHTING 295 of searchlights and projecting lanterns, the arc is arrangedas shown in Fig. 239. If the electric arc be formed by analternating current, the ends of both carbons are heated aboutthe same, the upper carbon being perhaps a little hotter thanthe lower, due to the upward…
Electrical engineering
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