Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 19
sly regarded by the unprotected eyealone. By viewing it through colored glass, however, or by2:)rojecting an image of it upon a screen, it may be studiedv/ithout danger. As the number of cells is augmented, the light becomes notonly more intense, but the arc may be materially lengthened,while its… … Fig. 1. TEMPERATUKE OF THE ELECTRIC ARC. battery, and which were the first that were made on an extendedscale, an arc of four inches in length was obtained in the openair, and in vacuo it increased to seven inches. Since then, morepowerful elements, and greater numbers have been employed,and the…
Electrical engineering
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