Lodge, Oliver, Sir, 1851-1940 · London, New York, Macmillan and co. · leaf 157
Fig. 19.—Another pivoted disk with flange to dip into liquid so as to make contactall round its rim. It rotates when a magnet is brought above or below ; or evenin the field of the earth. … Fin. 20.—A couple of radii of the above disk provided with points to dip into mercury,and rotating constantly under the influence of the steel magnet a. CHAP. VII.] ELECTRO-MAGNETISM. 139 (Gores arrangement, Fig. 21).^ In every case rotationbegins as soon as a magnet is brought near. 72. Nor is the…
Electricity
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