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.

    52/68 (page 44)
    [ 44] frecjuently ha ve been difappointed in endeavouring with it to fire inflamma- ble Subftances, when it has been yeadily done by a Sword or the Finger pf a Man. In tbe firft Paper * I had the Ho- nour to lay before you upon this Sub¬ jeci:, I took Notice of my having ob- ferved two different Appearances or the Fire from eledrified Subftances; <viz. thofe large bright Flaffses, which jnay be procured from any Part of eledrified Bodies, by bringing a Non- Eledric unexcited near tliem, and with which we Jiave fired all the inflamma- ble Subftances mentioned in the Courfe of thefe Obfervations; and thofe, like the firing of wet Gunpowder, which are only perceptible at the Points or Edpes of excited Non-eledrics. Thefe ]aft alfo appear different in Coiour and Form according to the Subftances trom which theyproceed: For from polifhed Bodies, f Page S.