The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)
Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 161
ET. 155 turned by the hand, so as to reverse the ends, these will befound at once to return to their former position when the forceis removed/ From the direction which these poles always take,the one pointing to the north is commonly termed the northpole, and the one to the south, the south pole,… … the south pole of a second magnet be presented, the two poleswill strongly attract each other; but if the north pole of themagnet. A, be presented to the same pole of the other rotatingmagnet, the latter will be repelled, as shown by the dottedspace; and, if both magnets be free to move on a pivot,…
Physics
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