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 334
in the core thread through the secondary^ coil producing induction effects. If the batterycurrent is sent through the secondary, induction is producedin the primary as before. This simple ring form of closediron circuit transformer represents the principle of construc-tion in all induction coils or… … 316 PRACTICAL ELECTRICITY,
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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