Observations on a series of electrical experiments / By Dr Hoadly, and Mr Wilson.

  • Benjamin Hoadly
Date:
1756
Catalogue details

Licence: Public Domain Mark

Credit: Observations on a series of electrical experiments / By Dr Hoadly, and Mr Wilson. Source: Wellcome Collection.

    23/80 (page 19)
    [19 ] axis of the bar *, and it will gradually flow into the bar, and reduce the electrical fluid there to its natural degree of denfity ; and whilft this is doing, and no longer, will the bar remain eleCtrified minus, When therefore two balls are both of them electrified plus, fufpended by two filk lines, and brought near one another; they repel each other, and ftand for fome time at a diftance from each other; becaufe the two atmo- fpheres, each of them exerting their endeavours to ex¬ pand into the air, want more room to do it in; and when the weight of the balls is not lufficient to prevent it, muft naturally drive them afunder, till thefe atmofpheres are diflipated, and the weight of the balls takes place again. And when two bodies are both of them eleCtrified minus, fufpended by filk firings, and brought near one another, they likewife repel each other, and ftand for fome time at a diftance from each other; becaufe the condenfed electrical fluid in the air, in order to force itfelf in at the furfaces of the balls between their two centers, crouds in, and forces them afunder, till the atmofpheres get all into the balls, and their weight then takes place again. But when two balls are in the fame circumftances, one eleClrified plus, and the other minus, and brought near one another; they will gradually come together and un- eleCtrify each other. Becaufe the atmofphere of the ball eleClrified plusy is endeavouring to diflipate itfelf