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 29
d to shocks or blows, a high temperature, or brought carelessly into contact with the poles of other strong magnets. 17. Compound or Laminated Magnets.—If a thick pieceof steel be magnetised and then placed in an acid bath (such asnitric acid) for some time, whereby the outer surface is eatenoff,… … Compound Bar Magnet. of the steel. If a permanentnumber of thin pieces of steel,magnetised separately, and fastened together with like polesat the same end, it will be stronger than one of solid steel ofthe same dimensions, because it is more thoroughly magnet-ised. Such magnets can be made in any…
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-electricengineer01inte-126-41.webp)
