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I had the pleafure to fee; that the down was but a 
little affected by the palTage of the fmoke, and dill 
remained eledrified. I then brought fundry beams 
from the Ipout of a boiling tea-kettle, and other wife, 
in the fame manner, and bill found, that the down 
remained eledrified. I then breathed on them in 
great plenty, but found that the down bill remained 
^eledrified. I then joined the palms of my hands 
together, with the fingers extended pe-’-pendicuIarly 
under the down, which bill remained eledrified; 
although the fubtile effluvia, thrown off by ^'>erfpira- 
tion, paffed in great plenty" through the down; as 
may appear by holding one or both the hands in the 
fame manner under any light matter floating in the 
air, which will be driven upwards thereby, with as 
great velocity as an eledrified feather is by any elec- 
trified body held under it. In biort, I tried all the 
vapours and exhalations I could think of, in the fame 
manner, and with the fame fuccefs. 
I then warmed a wine-glafs, and with the fkirt of 
my coat held infide and outfide the glafs between 
my fingers and thumb : I rubbed the glafs brifkly 
about, and eledrified the down, and found all ex- 
periments anfwer in the fame manner as they did 
with the wax. I mention this particular, becaufe 
fome writers on eledricity have faid, that there were 
two kinds of eledrical fire, the one refinous, and the 
other vitreous ; becaufe light bodies eledrified by 
glafs are attraded by eledrified wax, &c. and thofe 
eledrified by refins are attraded by glafs. But I 
think thefe different effeds mub'arife from fome 
differing qualities in the refin and glafs, which have 
power to aduate this fire differently. For if there 
were 
