A complete treatise of electricity in theory and practice; with original experiments / By Tiberius Cavallo.

  • Cavallo, Tiberius, 1749-1809.
Date:
1777
Catalogue details

Licence: Public Domain Mark

Credit: A complete treatise of electricity in theory and practice; with original experiments / By Tiberius Cavallo. Source: Wellcome Collection.

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    ctery fign of eledricity that the tube exhi¬ bits. But their electricities are not the fame; the eledricity of the tube being juft the re- verfe of the eledricity of the perfon, and their particular appearances are the following. i. Whenever a light body infulated, for inftance, a fmall piece of cork fufpended by a filk thread, has beenattraded by the tube, and afterwards repelled, if no conduding fubftance touches it in this ftate of re- pulfion, it will not be attraded by the tube again. The fame happens with the in- fulated perfon; for when this light body has been once attraded by any part of his body, and afterwards repelled, it will not be at¬ traded again ; but if in this ftate of repul- fton the tube be prefen ted to it, it will then be attraded, and that violently by the tube; and when repelled by the tube, it will be at¬ traded by the infulated perfon. Further, if two or more light infulated bodies, like the above-mentioned piece of cork, be feve- rally attraded by the tube, and when after¬ wards repelled, be brought within a fmall diftance of one another, they will repel each other, and if well infulated, continue in this elediihed and repulfive ftate for a coniidera- ble