Modern practice of the electric telegraph : a handbook for electricians and operators (1874)
Pope, Frank L., 1840-1895 · New York : D. Van Nostrand · leaf 123
de at 1, halfof it going through A B, and the other half goingthrough C D, to the point 2, and thence to the otherpole of the battery. The galvanometer Gr, placed on awire connected across from 3 to 4, will not be affectedas long as A B is equal to C D, no matter what theabsolute resistance may be.… … Fig. 57. and of D 100, the total resistance of A B will now be11. and that of C 1,100 ; but the tension in eachbranch will have fallen in the same proportion at thepoints 3 and 4, and no current will pass between thosepoints. If, therefore, we insert a known standard resistancein the wire B, and an…
Telegraph
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