[ 392 ] 
We next proceeded to try the force of eledlrical 
cohefion, with the ftockings of a more fubftantial 
make ; viz. thofe I have above defcribed ; and there 
we found it to be much more confiderable, as appears 
by the following experiments. 
i° When the white flocking was put within the 
black (without either of them being turned infide 
out), fo that the outfide of the white was contiguous 
to the infide of the black, they lifted nine pounds, 
wanting a few pennyweight. Now, taking the 
weight of the flocking to be one ounce, eighteen 
pennyweight, and fifteen grains (viz. the half of the 
weight of the pair as mentioned above), it follows, 
that, by the force of its cohefion with the black, it 
raifed fifty-five times its own weight. 
2 0 . When the white was turned infide out, and 
put within the black, their inner or rough fides being 
contiguous, they lifted -no lefs than fifteen pounds, 
one pennyweight and a half, before they feparated : 
So that, in this cafe, the fingle flocking raifed ninety- 
two times its own weight •f*. 
fion is furprifingly great between the black and the white flocking 
of fpun filk, when ele&rified : and yet I was allured by the hofier, 
that the white had never been put into the fumes of fulphur ; and 
that the colour it had was the natural colour of the filk, no other 
method having been taken to whiten it, than that of fcouring and 
wafhino-. 
O 
f Since that time, I have not been able to raife above ten or 
eleven pounds with thefe ftockings, even when the weather has 
been mod favourable ; owing, perhaps, to. my having cut off all the 
ends of threads, and tufts of filk, which had been left on the infide 
©f the ftockings ; which I did with a view of increafing the cohe- 
fion : whereas, when the inner Tides of the ftockings were put 
together, thofe ends of threads, and tufts of filk, by joining inti- 
mately with thofe of the different colour, probably contributed 
piuch to produce that powerful cohefion. 
3 
o 
