Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
t-ized by rubbing them with other bar-magnets. There are three waysof doing this, known as the methods by single touch, by separate toxicli,and by double touch. By single touch, the bar is magnetized by simply passing one end ofa powerful bar-magnet several times over it. By separate touch, the bar… … which may be simple or compound. In the drawing, four simple mag-nets, and the method of using them, are represented. Let H represent the bar to be magnetized. First place it upon theopposite poles of two magnets (only one end of each of which isshown), then take two other magnets, E and F, and,…
Physics · Astronomy
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