A treatise on electricity wherein its various phoenomena are accounted for, and the cause of the attraction and gravitation of solids, assigned : To which is added, a short account, how the electrical effluvia act upon the animal frame, and in what disorders the same may probably be applied with success, and in what not / By Francis Penrose.

  • Penrose, Francis, 1718-1798.
Date:
1752
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on electricity wherein its various phoenomena are accounted for, and the cause of the attraction and gravitation of solids, assigned : To which is added, a short account, how the electrical effluvia act upon the animal frame, and in what disorders the same may probably be applied with success, and in what not / By Francis Penrose. Source: Wellcome Collection.

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    wire to any diftance, if not interrupted by fome non-eleBrical body: to the end of which, by a third wire is hung an egg ; as foon as the globe is put in motion, and warm fpirit of wine is pla¬ ced fo as to touch the egg, the fpirit of wine will immediately take fire from the con tail of the egg. It has been already proved, that when the globe is put in motion, and your hand is applied to it, it grinds to pieces the air between the globe and the hand, and fo rarefies and expands it, and fends it off with great force, in the fame man¬ ner, as light is fent from any body of fire in ac¬ tion ; as may be feen, if the electrical machine is fet at work in the dark 5 when the emiffion from the glafs globe will appear lucid. The wires which are hung over the glafs globe, by thtfmallnefs of their poresy admitting nothing through them but light, and light being a body fo fiubtil, as to penetrate the pores of all other bo¬ dies, even to the very center of the earth; the interfiices of the wires are filled with it from one end to the other. As the light is one continued body, throughout the whole extent of the wire, th& force it receives at the end next the glafs globe, is immediately, and at the fame injlant of time, communicated to the other end, let the length or extent of the wire