Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
of currents, floAving in the same direction, is neatly illustrated by the spiral Avire, suspended as shoAvn, and dipping into a glass of mercury, BeloAV the platform the two poles of a battery are brought, one in contact Avith the mercury and the other with the metallic standard. As the current… … 400 ELECTRICITY. Fig. 5-2. by the current being broken, the weight of the spiral again restoresthe connection, and so on, causing a continuous movement and emis-sion of the spark, 769. Figure 52.—Action of magnets upon currents.—It has been shown that electric currents exercise a directive force…
Physics · Astronomy
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