Experiments and observations in electricity : With a postscript, containing likewise a variety of new experiements and observations in that branch of philosophy; particularly an enquiry into the cause of the electricity of bodies, and the constitution of the electric matter itself; with notes tending to confirm and illustrate the opinions advanced / By William Henley. Read at the Royal society, Jan. 16 and 23, 1777.

  • William Henly
Date:
1777
Catalogue details

Licence: Public Domain Mark

Credit: Experiments and observations in electricity : With a postscript, containing likewise a variety of new experiements and observations in that branch of philosophy; particularly an enquiry into the cause of the electricity of bodies, and the constitution of the electric matter itself; with notes tending to confirm and illustrate the opinions advanced / By William Henley. Read at the Royal society, Jan. 16 and 23, 1777. Source: Wellcome Collection.

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    T ,5 Mr. HENLif’s Experiments and neatly covered with the belt varnifh1^; and I fhould not omit to obferve, that Mr. hemming’s bottle, which re- 1 tained its charge fo long, was prepared in this manner. POSTSCRIPT, % Containing Jotne experiments and obfervations on Mr. volta’s machine, by Mr. tiberius cavallo, with remarks by Mr. henly. Mr. volta’s- machine, which occalioned feveral of the preceding enquiries, hath lately been made by Mr. cavallo, by coating the glafs plate (about fix inches in diameter) with fealing-wax. With one excitation of this plate he loon charged a bottle compleatly, and with that charge pierced three holes in a card, which he hath fince fhewed me. If, when this machine adted vigorously, he inverted the excited plate, and fet the brafs plate upon the glafs, he produced a contrary electricity, but in a much Imaller degree. If when the fealing-w'ax was ftrongly excited, fo that fparks, two inches long, might be drawn from the brafs plate, the excited wax, &c. was placed on an electric Hand, and the procels continued as ufual; the fparks from the brafs plate presently dimi- 1 (s) 1 he varnifhing fliould be feveral times repeated, nifhed,
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