[ 3H ] 
Exp. 14. Upon removing the flone by degrees 
from off the wood, the balls approached nearer and 
nearer : but when it was taken away entirely they 
receded again, and in this cafe were electrified minus 
in head of plus. 
This is a farther confirmation that the fluid flow- 
ing from the Jlone electrified the wood minus, by 
forcing part of the natural quantity in the wood into 
the balls, and fo made them plus ; but becaufe fome 
part of the fluid was forced likewife out of the balls 
into the air whilft they continued plus , therefore 
when the (lone was taken away, they w r ere juft as 
much electrified minus , as the force of the fluid flow- 
ing from the ) lone was able to drive out of the balls : 
and I have formerly fliewn * that the balls will re- 
- cede from one another in this minus flate as they do 
in a plus one, by the crouding in of the fluid from 
the air &c. on all fides to reftore the equilibrium ; 
but being retarded in fome degree in endeavouring 
to enter the balls by the medium on their furfaces, 
an accumulation is formed, and confequently atmo- 
fpheres fimilar to the plus ones ; with this difference 
only, that one is tending from the body and the other 
to the body. 
Exp. 15. After heating the ftone again in boiling 
water, I laid the plain fide upon the wood. In this 
cafe the balls continued at reft as they did in the 
eleventh experiment, when the convex fide laid upon 
the wood. 
* See exp. and obf. by Hoadly and JFUfott. 
Exp. 1 6. 
