[ 8 5 ] 
fhare thereof behind. This I know not how to ac- 
count for ; but does it not feem to corroborate your 
hypothecs, that the vapors, of which the clouds are 
formed, leave their fhare of electricity behind in the 
common flock, and afcend in a negative ftate ? 
EXP. III. 
I put boiling water into a coated Florence flafk, 
and found that the heat fo enlarged the pores of the 
glafs, that it could not be charged. The electricity 
paffed thro’ as readily, to all appearance, as thro* 
metal ; the charge of a three-pint bottle went freely 
thro’ without injuring the flafk in the leaft. When 
it became almofl: cold, I could charge it as ufual. 
Would not this experiment convince the Abbe Nollet 
of his egregious miftake ? For, while the electricity 
went fairly thro’ the glafs, as he contends it always 
docs, the glafs could not be charged at all. 
EXP. IV. 
I took a flender piece of cedar, about eighteen 
inches long, fixed a brafs cap in the middle, thruft 
a pin, horizontally and at right angles, thro’ each 
end, (the points in contrary directions) and hung it, 
nicely balanced like the needle of a compafs, on a 
pin, about fix inches long, fixed in the center of an 
eleCtric Hand. Then eleCtrifing the hand, I had the 
pleafure of feeing what I expected 5 the wooden nee- 
dle turned round, carrying the pins with their heads 
foremoTt. I then eleCtrifed the hand negatively, ex- 
pecting the needle to turn the contrary way; but 
was extremely difappointed, for it went ftill the fame 
way as before. 
5 
When 
