Twentieth century manual of railway and commercial telegraphy (1905)
Meyer, Frederic Louis, b. 1875 · Chicago, New York, Rand, McNally & Company · leaf 248
w through yourinstrument. That would simply cut the wirethrough, as it would only strike one of the wires to MANUAL OF TELEGEAPHY. 245 your instrument, and would have a short circuitthrough the board. To cut in an instrument one peg must be aboveanother and on the opposite side, but between thesame… … Fig. 26. 246 THE TWENTIETH CENTUEY The very first row of discs (which are sometimescovered with a metal strip, known as the lightningarrester) is connected to the ground wire, and aninsertion of a metallic ping on either side connectsthat side to the ground, instead of allowing it toliow ont to the…
Telegraph
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