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Handbook for the use of electricians in the operation and care of electrical machinery and apparatus of the U. S. seacoast defenses .. (1904)

United States. War Dept · Washington, Govt. print. off. · leaf 126

An illustration from Handbook for the use of electricians in the operation and care of electrical machinery and apparatus of the U. S. seacoast defenses .., 1904, leaf 126 — 4lxl2l% X 12 l% X 12 % X 6 solid.% X 7 cored.% X 7 cored.1 X 7 cored. All are fitted with true parabolic ground glass, silver-plated mirrors, as speci-fied for standard use in the Navy Department. The light reflected from theparabolic mirror is whiter and more penetrating than from a spherical… … 121. Rheostat for U, S. Qovemment Projector. (90)

Electric machinery · Searchlights · Coast defenses

Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.

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