Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 38
Figs. 529 and 530.—Galvanometer lamp and scale for individual use. The scale is etched on aground glass strip 6 centimeters vnde by 60 centimeters long with long centimeter divisionsand short millimeter divisions the entire length, reading both waysfrom zero in the center.It is mounted in an…
Electrical engineering
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