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 319
Fig. 266.—Students Ex-perimental Induc-tion Coil. D. … 300 PRACTICAL ELECTRICITY. A simple form of students induction coil is illustrated in Fig. 266.The primary is a wooden spool wound with 2 layers of No. 15 B. &S. insulated copper wire, with the terminals securely fastened to binding posts, which are mounted at right angles to the coil. The…
Electricity · Magnetism
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