Introductory course of natural philosophy for the use of schools and academies. Ed. from Ganot's popular physics. By William G. Peck (1869)
Ganot, Adolphe, 1804-1887, Peck, William Guy, 1820-1892 · New York A.S. Barnes · leaf 363
Fig 287. Every magnet has two poles and one neutral line, whether themagnet be natural or artificial. Sometimes, besides the two prin-cipal poles, there are other minor poles, called secondary poles. Inartificial magnets these arise from inequality of temper in the steelbars, or from want of proper…
Physics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
