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)
les arranged as shown by theletters N and S. If a magnet-ic body, as an iron key, beplaced in contact with one ofthe poles of the magnet, it willbe magnetized, and adhere tothe magnet. If a second key be broughtin contact with the first, italso will be magnetized andadhere as shown, and so on.If… … Fig. 43.
Physics · Astronomy
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