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 75
to the needle when it is pointing N. and S., constitutes a simple formof detector galvanometer, and when inserted in a battery circuit willindicate by the deflection of the needle that a current is flowing.Various types of galvanometers are described in Lesson XVI. 70. Potential and Electromotive…
Electricity · Magnetism
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