Theory and practice of the electric telegraph; a manual for operators and students (1875)
Churchill, Charles Henry, d. 1904. [from old catalog] · Oberlin, Ohio, Sherman & bros. · leaf 151
ng post 2 tothe key, K, from which it passes through the main batteryM. B., to the ground at G. A ground wire also passesdirectly from the lightning arrester to the ground. The con-nections of the main circuit are represented by the continu-ous line, the local circuit by the dotted line. The latter… … very The arrangement of instruments and batteries at astation is shown in Fig. 64. The course of the line is from L, through the lightningarrester A, to the relay R, by way of the binding post 1,thence through 2 to the key through the second lightningarrester to the line L. At S is a cut out, a…
Telegraph
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
