Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 275
ration this last named method,lighting by means of electricity has an extremely limited rangeof application. 256 THE ELECTRIC LIGHT. Electric liglit, as produced by the arc, in foci of great lumi-nosity, is unquestionably an economical light when concentra-tion of light is advantageous, but even… … Fig. 137. tude as must always greatly diminish, and frequently entirelyneutralize, the advantages of its economy and extreme brilliance.Where concentrated and powerful light is inadmissible, andan equable distribution of light by means of small light centresis required, there the electric arc is…
Electrical engineering
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