American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 632
W^ INF i … For measuring pieces of wire of very low resistance, the 10,000 ohm coil of e, andthe 10 ohm coil of r of the bridge arms are used. Iliis, of course, gives a ratio of1,000 to I. Or a ratio of 100 to i may be obtained by using the 1,000 ohm coil in R,and the 10 ohm coil in e. In making the test the…
Telegraph
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