Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 405
Fig, 229. 384 THE ELECTRIC LIGHT. … Fig, 230, THE CLERC LAMP. 385 then the drilled carbon rod, across the connecting projection ofthe small carbon pencil to the other carbon and to line. Theeffect is that the soft iron core is pulled into the main circuitcoil, and the metal fork being lifted out of the mercury cups thederived circuit…
Electrical engineering
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