Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 404
en the carbons have been pushed to theirdistance limit. A safety switch is mounted on the upper por-tion of the lamp bracket, through which the current passes bytwo paths. A portion goes through the German silver resistance coils,shown on each side, then through two mercury cups connectedtogether… … Fig, 229. 384 THE ELECTRIC LIGHT.
Electrical engineering
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