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.

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    5° That when we have thus changed the natural ftate of this fluid within any body, whether by encreaf- ing or diminifhing its quantity, or any other way ; there is a refiftance, greater or lefs according to various circumftances, made to the fluid’s returning to its natu¬ ral ftate again within that body. 6° and laftly, That there mu ft therefore be fome ac¬ cidental or defigned affiftance given from without (inde¬ pendent on the body and the electrical fluid contained within it) before they can return to their natural ftate again. With regard to the different refiftances which are made by different bodies, againft being electrified, or uneleCtrified ; from a great variety of experiments, very carefully made, we may depend upon the truth of the following obfervations, viz. i° That Glafs, Wax, Rofin, Brimftone, and fuch like bodies, refift the moft, provided they are of a fufficient thicknefs: and Silk, Hair, &c. provided they are of a fufficient length. 2° That next to thefe fort of bodies the Air refills moft, provided there be a fufficient quantity of it, and it be clear and free from vapours. 3° That this refiftance is weakeft in Metals, Mine¬ rals, Water, Quickfilver, Animals and Vegetables, and at the furface of the Earth. But, laftly, that the refiftance in thefe laft mentioned bodies is greater, when their furfaces are polilhed and extended
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