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 51
bringing near it a bar magnet with some filings attractedto it. The attraction or repulsion between the filings can benoticed at a considerable distance. 41. Magnetic Screens.—Permit a magnet to deflect amagnetic needle from its N and S-position ; the deflection isnot altered, if any non-magnetic… … MAGNETIC INDUCTION. 3S net, as shown in Fig. 47. A piece of iron, however, when inter-posed between the magnet and the needle, acts as a magneticscreen and reduces the deflection of the needle toward the mag-net. A needle, free to move, takes up a position in the earthsmagnetic field with its…
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-electricengineer02inte-144-59.webp)
