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American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)

Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 131

An illustration from American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation, 1909, leaf 131
As stated elsewhere (page 207^), the unit of inductance is the henry, which isdefined as the amount of inductance existing in a circuit that will develop one voltwhen the current varies uniformly at the rate of one ampere per second. From thisit follows that the inductance e. m. f. or reactance in…

Telegraph

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