to opposing reaction to an electromotive motors. The freer a motor is from such force is a " counter-electromotive force." objections, the more efficient will it be. The experiment of showing the exis- But the efficiency of a motor in utilizing tence of this counter-electromotive force the energy… … pressure steam-engine does not become more " efficient " by being supplied with S. P. THOMPSONS LANTERN GALVANOMETER. high-pressure steam. Nor can a high- little motor, a few cells of battery, and a pressure steam-engine, however well con- galvanometer. The galvanometer I shall structed, attain a…
Engineering
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