American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 47
mile,,a wire of the same length and material, weighing 400 pounds, will have a resistanceof 3 ohms. If, as in Fig. 15 ^, a number of conductors be connected with a given battery, orother source of e. m. f., the whole may be classed as one circuit, the total resistanceof which will be that due to… … In Fig. 15 ^, let A B c represent 3 copperwires of equal diameter and length, weighing3 j^ounds each, and each having a resistanceof 12 ohms. It is evident then that, as regardselectrical resistance, these 3 wires are equal to iwire of similar length, weighing 9 pounds.Consequently, if the 3 wires…
Telegraph
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