Observations on a series of electrical experiments / By Dr. Hoadly, and Mr. Wilson.
- Benjamin Hoadly
- Date:
- 1759
Licence: Public Domain Mark
Credit: Observations on a series of electrical experiments / By Dr. Hoadly, and Mr. Wilson. Source: Wellcome Collection.
10/96 (page 6)
![[6 ] the fame: and therefore that a bar of iron fufpended carefully by filk lines, furrounded by air at a proper diftance from other bodies, is difpofed of in the beft manner to remain electrified ftrongly, after it is once .electrified. And the reafon of this is, that the fluid within the bar cannot return to its natural ftate without part of it is thrown out of the bar; but the filk lines, by which it is fufpended, and the clean dry air, with which it is every where furrounded, refift the admifiion of this fluid within them the ftrongeft of mo ft bodies: and therefore when the bar is once electrified, it is thus difpofed in the propereft manner to remain fo, as all tthe bodies contiguous to it, will not admit any of this ifluid into them, but with the greateft difficulty. In the next place, I confider that a more extended furface refills more than one lefs fo, and that bodies ending with points hardly refift at all; and confequently, that 1 fhould choofe a bar of iron extended in length, and having its ends fhaped into fpherical forms, or ending with large knobs. And laftly, I confider, that if I take care to have a high polifh given to the bar, I fhall ftill give a greater power, when once it is electrified, to refift being un- eleCtrified : which I have fuppofed to be the drift of my experiment. But now I have thus made choice of the moft proper bar, and difpofed of this bar in the beft manner in or¬ der to produce the greateft effeCt when it is made to re¬ turn A](https://iiif.wellcomecollection.org/image/b30417429_0010.jp2/full/800%2C/0/default.jpg)
