Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 182
cetheir axes lie in the same straight line. The magnetic whirlsof each turn inside the helix arc in the same direction as everyother turn, and the direction of the magnetic field along, andparallel to the axis of the solenoid, is straight and fairly uni-form to within a short distance of the ends.… … N.rtfiPolof Helix
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
