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

  • Benjamin Hoadly
Date:
1759
Catalogue details

Licence: Public Domain Mark

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

    14/96 page 10
    [ *° ] In the firft cafe, when the body has more of this fluid forced into it than it has naturally, it is faid to be eledrified plus ; and in the other cafe, when part of its natural quantity is driven out of it, it is faid to be elec¬ trified minus: and in both of thefe ftates the body fhews the ufual figns of being eledrified. I (hall begin with the experiments in which bodies are eledrified plus and minus. Let us now take a bar, that is tapered down at each end to pretty fharp points; and placing it horizontally on a tall drinking glafs that is clean and dry; fee what effeds will follow on bringing an excited tube within the diftance of about fix inches from the bar (more or lefs, according to the degree of force given to the excited tube) firft towards the middle of it, and next towards either of its ends. * In the firft cafe, the bar will be eledrified minus, and in the latter cafe plus; or in other words, in the firft cafe, the bar, when the experiment is over, will have lefs of this eledrical fluid in it than naturally belonged to it, and in the latter cafe more. We {hall begin our explanation of thefe experiments with fome obfervations on the firft, where the bar is found to be eledrified minus. How we know this will be feen by and by. Now if the bar is eledrified minus > then fome of this fluid, more than was forced into it, muft have efcaped out of it. * See Mr, John Carton's experiments in page 350, the Phil Tranf. Vol. 48,
    digitised image 1
    digitised image 2
    digitised image 3