American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 258
isthen placed over the second coil, and a thirdcoil of 1800 convolutions over that. The wire used is about No. ^6, B. W.G., silk insulation. As it is very difiicult to draw wire ofthis diameter which will have a uniformresistance throughout its length, the man-ner now to be described of connecting… … 2 1 6 AMERICAN TELEGRAPHY. tial tliat they sliould be of equal resistance, and have an equal magnetic effectupon the cores when an equal current is passing around each. This arrangement ofthe coils effects this desideratum in a high degree, hv distributing the resistance of thetwo coils over the…
Telegraph
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