Electricity for public schools and colleges . a piece of wet paper between thezinc and the gold-leaf electroscope, we shallfind that, on removing the bar and raisingthe upper condensing plate, the lower plate Fig. ii. is at a -^- V. Voltas view would be that the copper held in the moistened hand ispractically at ^ero-V ; the zinc at a -i- V ; the wet paper at practically thesame V as the zinc ; and the brass of the electroscope at practically the sameV as the paper, and therefore at the -f V ofthe zinc. The reader should examine theseexperh-nental results in connectionwith the statements made
Electricity for public schools and colleges . a piece of wet paper between thezinc and the gold-leaf electroscope, we shallfind that, on removing the bar and raisingthe upper condensing plate, the lower plate Fig. ii. is at a -^- V. Voltas view would be that the copper held in the moistened hand ispractically at ^ero-V ; the zinc at a -i- V ; the wet paper at practically thesame V as the zinc ; and the brass of the electroscope at practically the sameV as the paper, and therefore at the -f V ofthe zinc. The reader should examine theseexperh-nental results in connectionwith the statements made above as toVoltas views. § 4. Voltas Pile, from Voltaspoint of view.—By the application ofthe method of experiment (iv.) above,it is easy to obtain A V. .r high enoughto give shocks and to produce smallsparks. We lay down a copper disc andput it to earth. On this we lay a zincdisc, which will be at some higherpotential that we will call v. On this we place a somewhat largerdisc of flannel, moistened with salt and water; this will also be.
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Keywords: ., bookcentury1800, bookdecade1890, bookpubl, booksubjectelectricity
