Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 199
e providedfor the terminals ofeach coil and the coilsmay be connected inseries, parallel, etc.,care being exercisedto have the directionof current as given inFig. 167. The coils ofeach needle may beused separately forcomparing two differ-ent current strengthsat the same time,when the direction… … Fig. 168.—Thomson Mirror-Reflecting Double CoilAstatic Galvanometer with Case Open. GALVANOMETERS. 181 galvanometery used for measuring momentary currents (as inductioncurrents or the discharge of a condenser, r 303), the magnetic systemis constructed so as to have considerable weight, and arranged…
Electricity · Magnetism
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