An essay to shew the cause of electricity; and why some things are non-electricable : in which is also consider'd its influence in the blasts on human bodies, in the blights on trees, in the damps in mines, and as it may affect the sensitive plant, &c / In a letter to Mr. William Watson. By John Freke.

  • John Freke
Date:
1746
Catalogue details

Licence: Public Domain Mark

Credit: An essay to shew the cause of electricity; and why some things are non-electricable : in which is also consider'd its influence in the blasts on human bodies, in the blights on trees, in the damps in mines, and as it may affect the sensitive plant, &c / In a letter to Mr. William Watson. By John Freke. Source: Wellcome Collection.

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    [49 ] Now if, as in a Barometer, the Quick¬ silver is fufpended by. the Air on the fop of the T ube, which was extracted or emerged out of the Quicklilver, by the Weight of the faid Quickfilver, and as that Air in the Barometer can¬ not but have a Communication with the ambient Air, the Air within the Barometer mu ft thence be af¬ fected, by its becoming lefs elaftic alfo. But this is not fo much to my pre- fent Purpofe, as to confider the Air loaded not only with Vapours, but with poifonous Ejjluvtci from the Steams oi various Minerals, as well as with the Salts of dead Infects and Animals, which, in the Seafon of Autumn, may probably occalion fo many Agues, and putrid Fevers, as are met with.