A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 69
Fig. 74. Box Balance. perspective in Fig. 74, and in plan in Fig. 75.The bridge arms, corresponding to the resistances x 1000 100 10 9 10 100 1000 … Fig. 7 J. Box Balance. A and B, of Fig. 73, consist of resistance coils of10, 100 and 1,000 ohms each, inserted in thearms q z, and q x, of Fig. 75. These arecalled the proportional coils. The arm corre-sponding to resistance C, of Fig. 73, is composedof separate resistances of 1, 2, 2, 5, 10, 10,…
Electricity · Electrical engineering
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