Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 189
coil is subjected to differentknown pressures, and marking these values on the scale; theprocess is called calibration and the galvanometer is calibratedabsolutely as a direct reading instrument. It is still the cur-rent that deflects the needle, and its strength is dependentupon the pressure.… … ^O^-O/t-tcW. Fig. 155.—Measuring In-sulation Resistance. GALVANOMETERS. 171 principle of action, galvanometers may be divided into twoclasses ; first, those in which the magnet or magnetised bodyis arranged to move and the coil held stationary, and second,those in which the magnet is stationary and…
Electricity · Magnetism
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