Electrical and scientific instruments and apparatus : november 20th, 1899 (1899)
Elmer G. Willyoung & Co · New York : E.G. Willyoung · leaf 101
.W4138. Ballistic Six upper suspensions for Galvanometer.Six lower These items in separate case. 4th Oroiip. Tripod with extension legs. Folding Stool. In use the galvanometer fits upon the tripod head and connects to 1st Group by flexibles. Manipulation of keys, plugs, etc., does not,therefore,… … f0 Fig. 86. Diagram of Fundamental Law op Photometry. PHOTOMETERS AND PHOTOMETRY. Pliotoiiietry deals with the measurement of the light giving prop-erties of light sources as also with that of the illumination thus produced.Basic LiRAV of niotometry.—Fig. 86 shows two concentricspheres of radii,…
Electric apparatus and appliances · Equipment and supplies
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