Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 352
n the current leaves the pipe A, passing through the ground and entering the pipe B, behind the joint, thus causing a ring of corrosion where it leaves the pipe to enter the ground (ab). It is therefore quite important not to use water or gas pipes as a part of any circuit, unless they are…
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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