Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 322
other partremains fixed, or that the current in one part can beleversed. The latter device is adopted in the construc-tion of the eleclromagnetic engiiies described in Art. 375 ;the former alternative is applied in a good many interest-ing pieces of apparatus for showing rotations, a… … current rising through a and passing through the lightlypivoted wire b V in either direction, passes down intoa circular trough containing mercury. The trough ismade of copper, and is connected with a wire which isalso wound in a coil round the outside of the trough, CHAP, v.] ELECTRICITY AND…
Electricity · Magnetism
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