Instructions for testing telegraph lines and the technical arrangements of offices (1878)
Schwendler, Louis, 1838-1882 · London : Trèubner · leaf 220
ral current in the loop, it is clear that its effectscan be eliminated by taking readings with reversed testcurrents. It must, however, be remembered that only those suc-cessive positive and negative readings can be used forwhich the natural current has not sensibly altered itsdirection or… … \st Case. There are only two wires on the line,namely, those that are in contact with one another.Connect one of the lines, the distant end of Avhich is 2o6 LINE TESTING. to be put direct to earth, to the Bridge at the point L,and the other line, the distant end of which is to beinsulated to one…
Telegraph · Telegraph lines
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-153-91.webp)
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-158-66.webp)
