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)
ed w4th a small bellin place of the button or knob, is set upon aboard, near to a small brass ball fastened toa silken thread, which is held at the upperend by a metallic rod, A. This rod connectswith the earth, and supports another smallbell. The positive electricity of the jar attractsthe little… … CHAPTEK XV. DYXAMICAL ELECTRICITY.FUNDAMENTAL PRINCIPLES. ^^7_ Galvanism.—Electricity excited or produced by chemicalaction is called Galvanism, in honor of Galvaui, who first observedcertain plienomena which led to the discovery of generating electricityin this way. 722. Figure 31.—Galvanis…
Physics · Astronomy
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