The standard electrical dictionary; a popular dictionary of words, terms, and phrases, used in the practice of electrical engineering (1897)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, H. W. Henley & co. · leaf 419
the lens. The candle holder slides along a grad-uated bar G, and at D is an index plate to show the angle at whichthe spindle carrying the mirror is set. 4i4 STANDARD ELECTRICAL DICTIONARY. Dr. J. Hopkinsonin his dispersion photometer uses a double con-vex lens. This gives a focal image of the… … which the relative Fig. 262. Rumfords Shadow Photometer. intensity of the two lights is estimated by the intensity or strengthof shadows of the same object which they respectively cast.
Electricity
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