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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    [ =9 ] that inner furface $ and, 2°. How part of the eledrical fluid naturally belonging to it can be driven out into the vacuum, without fuch a flow of the fluid from the ex¬ cited tube through the glafs to get at it immediately. In order to prove the firft of thefe, the beft way feems to me to be, to fuppofe the contrary, that the electrical fluid does flow into it, and fupply it continually, and to enquire what would be the conlequence of fuch a fuppofition at the end of the experiment. If upon this enquiry, we find that the appearances anfwer in fad to what we ought to exped from this fuppofition, there will be no reafon to rejed it. But on the contrary, if the appearances are againft it, it muft be given up. Now if there was fuch a flow of this fluid from the excited tube through the whole fubftance of the glafs to the very inner furface of it, fo as to fupply the very quantity it drives out through it $ the glafs at this inner furface muft always have its natural quantity in it y and confequently, when the excited tube is withdrawn* remain in its natural ftate, equally capable, as at firft, to refill the entrance of any more of this fluid into it. And therefore, on withdrawing the excited tube, there would be no fuch return of light from the brafs, &c*. darting fo particularly towards that part of the inner furface of the glafs, as appears in the experiment. So
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