History, theory, and practice of the electric telegraph (1866)
Prescott, George B.(George Bartlett),1830-1894 · Boston, Ticknor and Fields · leaf 319
e line wires now connect with the outer wires of the heli-ces, and whenever a discharge occurs, it generally burns off thesmall copper wire before reaching the inner part of the coils, andthey are thus rarely ever seriously injured. There have been several kinds of lightning-arresters, or… … Fig. 86. paper, between, and to connect one piece of the brass with the linewire and one with the earth. The atmospheric electricity, being ofsuch high tension, prefers to pass through the thin sheet of paper,and thus reach an excellent conductor to the earth, rather than ATMOSPHERIC ELECTRICITY.…
Telegraph
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