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)
nce, as a silkcord; the middle bell is also con-nected with the earth by a metallicchain. By turning the machine, the bells,E and F, becoming positively elec-trified by the prime conductor, at-tract the balls, which, becomingpositively electrified, are immediatelyrepelled; and, striking against… … ELECTRICITY. 367 Fro. 19.
Physics · Astronomy
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