Experiments and observations tending to illustrate the nature and properties of electricity. In one letter to Martin Folkes, Esq, President, and two to the Royal Society / by William Watson.

  • William Watson
Date:
1746
Catalogue details

Licence: Public Domain Mark

Credit: Experiments and observations tending to illustrate the nature and properties of electricity. In one letter to Martin Folkes, Esq, President, and two to the Royal Society / by William Watson. Source: Wellcome Collection.

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    [34 ] !ong, to throw off feveral Pieces of Leaf-Silver lying upon a Card at the other End of this Rod, whereas I ne- ver have been able to throw it off by any Means in very wet Weather. Be¬ lides I am of Opinion, that after the Ele&rical Fire is gone from the Tube, the Tube has no Share in the conducl- ing of it; my Sentiments on that Head I laid before you in a former Pa¬ per: For if the Silk Lines are wetted, they diffufe ali the Ele&ricity, and the fame Effedts happen when the Air is wet, be your Glafs of what Colour it will. It may not be improper here to obferve, that Zaffer, which is ufed by the Glafs-makers and Ena- mellers, is made of Cobalt cr Mun- dick calcin’d after the fubliming the Flowers. This being reduced to a ve¬ ry fine Powder, and mixt with twice or thrice its own Weight of finely powdered Flints, is moiften’d with Water and put up in Barrels, in which it v