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 182
cetheir axes lie in the same straight line. The magnetic whirlsof each turn inside the helix are 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.…
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-571-343.webp)
