St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 140
Fig. 207. the carbons are made to touch, a current is established.On separating the carbons, the momentary extra currentdue to self-indu(5tion of the circuit, which possesses a higheledlromotive force, can leap the short distance, and indoing so volatilizes a small quantity of carbon between HOW… … the points. Carbon vapor, being a partial condudtor, allows the current to continue to flow across the gap, provided it be not too wide ; but as the carbon vapor has a very high re-sistance it becomes intenselj^ heated by the passage of the current, and the carbon points also grow hot. Since,…
Electricity
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