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 174
saround it in the direction ofthe circular lines of force,also so that the needlesmagnetic lines of force arein the same direction as themagnetic lines of the circu-lar field, % 43. TheN-polesof the needles point in thesame direction as the mag-netic lines of the current,and these lines pass… … Fig. 131.—Current Flowing Down-Whirls Clockwise. Sr !£><?_ O Win
Electricity · Magnetism
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