Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 25
y of either of its poles.Any variation in the strength of this current will cause corre-sponding variations in the attractive power of the magnet. If therod be of steel, and permanently magnetized, it will exert an attract- THE MAGNETO TELEPHONE. 3 ive force of its own on the armature, and the… … FIG. 2.-LINES OF FORCE OF EAR-MAGNET. iron) has exerted on it, by the magnet, an influence of attractionor repulsion. This field of force is usually graphically repre-sented by closed curves, radiating from the poles of the magnet,and the strength of the magnet is commonly measured in terms of JV
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