American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 181
on ohmsfrom binding post to binding post, {SeeY\^. 125), is frequently employed. It is gen-erally known as the English megohmPIG. 125. plate. It is preferable to use large resistanceswhen the unknown resistance is large; andalso to employ for the actual test a batteryof high electromotive foree. In… … PAETIAL INSULATION RESISTANCE OF TELE-GRAPH LINES. It is quite frequently desirable to knowthe insulation resistance of a section of acircuit which is not directly accessible. For example, Fig. 126, assuming a wiretested at a to have an insulation resistanceof 600,000 ohms from A to c, and…
Telegraph
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