Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 382
ic field. One way to explore the field is by means of a small compassneedle. Place a bar-magnet on a sheet of paper and slowly move a small compass needle about it. ,..-—«ii> The action of the two poles of the / \ magnet on the poles of the needle ^f ,„„„„ ^^^ will cause the latter to set itself… … curves run from one pole to the other. In Fig. 450 is shownthe direction of the needle at several points, as well as a lineof force extending from one pole to the other. Another way to map the field is by means of iron filings.This is very simple and very efiective. Place a slieet of paperover the…
Physics
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