Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 430
constant of the instrument for this type oflamp is determined. The unknown lamps are then put in place andtheir candle-power is readily determined, once the constant of theinstrument is known. Figs. 93 and 94 give some views of the inte-grating sphere and indicate the range of the sizes in which it… … Fig. 95. Station Photometer moving on a suitable scale, and the lamp holders, one for the stand-ard, the other for the lamp to be tested, are mounted at the ends ofthis scale. There are several types of so-called station photometersarranged so as to be very convenient for testing incandescent…
Electrical engineering
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