[ 372 ] 
and by thole, to which more has been communicated,, 
parting with their additional quantity. Both one and 
the other of thefe is. from the eladicity of the eleCtric 
matter, attempted to be done from the neareft non- 
electric ; and when the air is moiSt, this is foon ac- 
complished, by the circumambient vapours, which 
here may be considered as preventing in a very great 
degree our attempts to infulate non -eleCtric bodies. 
But thefe matters I have copiouSly treated of in my 
former communications upon this fubjeCt *: this Short 
recapitulation however I thought neceSTary, for the 
more eafy illustrating what I propofe to fubjoin > 
and it is upon thefe principles that we are able to ac- 
count for the circulation of electricity defcribed in the 
Phthfophical PranJaSlions, Vol. XLIV. p. 740. 
If therefore the before-mention ’d principles are 
true, and if the electricity is not furnifhed by the 
globe in its rotation, nor by the air, it ought to be 
viiible in the vacuum of the before- defcribed glafs 
tube, in its ingrefs to the frame of the electrifying 
machine, if this machine, and the man who turns 
the wheel thereof, are 1'upported by eleCtrics per /<*, 
and if, during this operation, the eleCtricity, as faffc 
as furnifhed, is taken off by a byStander, or other- 
wife, from the prime conductor ; as under thefe 
circumstances the vacuum is the only paSfage open to 
its progrefs, and from its elasticity the eleCtricity 
jhould protrude itfelf through it. And from ex- 
periment this is the cafe; for, upon a piece of 
wire being connected with the end of the long brafs 
rod. 
* See Phil. Tranf. Vol. XLV. pag. 95 & fcq. 
