[ 3^1 ] 
when thofe of the fame colour were put one within 
the other, and inverted, they dropped afunder of them- 
felves ; or if there was any intanglement about the 
heel, a little fhaking difengaged and feparated them : 
however, if it fhould be thought proper, the allow- 
ance of an ounce may be made, by deducting fo 
much from the weight refpeCtively found. 
I have but one circumftance more to mention, be- 
fore I proceed to give the refult of my experiments ; 
which is, that we muft not be furprifed, when we 
find the force of cohefion externally, to be in no re- 
gular proportion with that within ; for when the 
ftockings are highly electrified, they rulh together 
with fuch impetuofity, that it is extremely difficult 
to direCt their motion, and make them meet in the 
manner mofi advantageous for cohefion. 
In the experiments I have made, to meafure the 
force of eleCtrical cohefion, I have always found it 
anfwerable, fo far as I could judge from appearances, 
to the degree of electricity at the time excited. 
When the ftockings have been but weakly electri- 
fied, I have found them unable to fupport the weight, 
the one of the other. When in a more powerful 
ftate of electricity, I have known them to raife, re- 
fpeCtively, from one to twelve ounces, and upwards ; 
nay, once I found the cohefion fo firong as to move 
feventeen ounces, including the fcale and the black 
flocking. For the fake of accuracy, I fhall give a 
particular account of the refult of a few of my mofi; 
remarkable experiments, as I find them in the notes, 
which I took at the time of making them. 
The firft I find is of the 30th of March ; the 
wind at north-eaft j the weather clear, inclining to 
V o l. LI, A a a froft. 
