Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 260
sof each track section. These bonds are shown at / inFig. 15, the middle points of the windings of adjacent bondsbeing connected together. In other respects, the one-rail RAILWAY SIGNAL SYSTEMS 245 and two-rail signal systems are identical; compare theschemes of Figs. 14 and 15. The impedance bonds… … PLAN VIEW-COVER REMOVED.
Telegraph
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