American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 184
nd the insulators are nearljrfilled with acidulated water, care being observed that the water does not get over,or upon, the edges of the inverted insulators. Bent Aviresare then plunged intoeach of the insulators in the man-ner indicated and these are thenconnected with the galvanometerG. Another… … II tests. The constant of thegalvanometer is taken as usual in the direct deflection method test. Assuming, as shown in figure, that four insulators are to be tested the result obtained in this case will be the joint resis-tance of the four insulators. The result should be multiplied by 4, and if…
Telegraph
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