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 49
lled breaking or opening the circui t. 5. How long arc the terminal wires? The wires may be of any length, even to hundreds ofmiles, provided a sufficient number of cells be used. G. What names are given to the plates? The plates are named from the electric condition of their dry ends. Thus the… … OF VOLTAIC ELECTRICITY, 29 3. Electric Coalitions.—1. Whal the circuit? .i.1 cnllti >:i ol tin plat33 before clos- Fig. 15. As soon as the plates are set in the liquid they become pol-arized; the dry end of the zinc being — and the wet end -f-;the copper the reverse. ?. WhaS is tlijproDf of this…
Telegraph
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