Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 455
Fig. 261. Fig, 262. come in contact witli other portions of the lamp, short-circuitingU, and in many instances melting the chain and ruining the THE WOOD ARC LAMP. 435 mechanism. To obviate this evil, focussing lamps have been de-signed, with a cord to replace the chain. While this cord willnot…
Electrical engineering
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