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 336
g. 286, where theconnections can be readily traced. Using the primary alone, theautomatic action of the electric bell is illustrated. When short lengths of brass tubing are attached tothe secondary terminals andthen clapped, one in each hand,a peculiar muscular contractionis produced, due to the… … Co-ndenser Fig. 285.—Diagram of Connections of a Spark Coil.
Electricity · Magnetism
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