Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 304
move, dip into two cups of mercury,located one above the other along the axis of the coil. Con-nections are made as indicated, so that the two coils are inseries when connected to an external circuit. The planes ofthe coils should be at right angles to each other. When thecurrent flows through both…
Electricity · Magnetism
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