Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 269
, which last during six hours burning. These carbonscost 11 cents per foot, and the hourly expense for carbons isaccordingly about four cents for each lamp, or about $1.20 forthe 10 lamps for three hours, including waste. The Maximlamps cost $1.94 each, and last for about 1,000 hours ; equiva-lent… … THE MAXIM INCANDESCENT LAMP. 251 Attendance $0.60 Carbons 1.20 Renewals of Maxim lamps 18 Total $1.98 The cost of the acidulated water used in the accumulators,which contains ten per cent, of sulphuric acid, is insignificant.The cost of the installation was $3,600, and taking interest at5 per…
Electrical engineering
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