Lodge, Oliver, Sir, 1851-1940 · London, New York, Macmillan and co. · leaf 157
ves the rimby mercury trough M. The same apparatus obviously serves to demonstratecurrents induced by motion ; both directly and by the damping effect. on each side, near the contact place of the rim; thedisk at once begins to rotate (Figs. 18 and 19). Instead of a disk one may use a single radius… … 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.
Electricity
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