Andrews, Ernest John, 1863-, Howland, Howard Newell, 1865- joint author · New York, London, The Macmillan company · leaf 272
as shown bythe arrows. As n comes into the position of s, commu-tator segment 4 will take the place of 1, and the currentwill be reversed, changing 7^ to a south pole. And a studyof the figure will show that a similar thing happenswhen s takes the place of n: it becomes a north pole.So we always… … Fig. 158. through sbrush B. and s in the opposite direction and out on the 260 ELECTRICITY [§§ 403-i04
Physics
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