Matter, ether, and motion; the factors and relations of physical science (1892)
Dolbear, A. E. (Amos Emerson), 1837-1910 · Boston, Lee and Shepard · leaf 219
clue to the mag-netic field, may be as great as two hundred pounds persquare inch. When a piece of iron is brought near to a magna,and it becomes a magnet by induction instead of bycontact, it is to be understood that its molecules arerotated into similar positions by the action of themagnetic… … 206 MATTER, ETHER, AND MOTION It was stated at the outset that a loop of iron throughwhich an electric current is passing is a magnet, andprevious to that it was pointed out that an electric current in a wire has a fieldthat extends indefinitely outfrom it. If such a wire bedipped in iron filings,…
Physics
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