Ill 
Qbjervations in Electricity. 
X>3Y. Hour. Diftance at which the 
balls diverge. 
May 22 4 P. m. ia{ inches. 
8 P. M. O 
IO~ P. M. 2 
23d, Mr. hemming (hewed me the experiment, when I 
faw the balls feparate at twelve inches dillance from the 
cylinder. The caufe of thefe phenomena is, no doubt, 
the excited eleilricity lodged in the pores of the glafs 
acting upon the vapour in the air of the room, and pro- 
ducing a greater or lefs effect, as circumftances may 
contribute to inereafe or diminifh its operation. The cy- 
linder was now ufed again, which clofed this fet of ob- 
fervations. Mr. hemming has added a meteorological 
journal for the time; but the particulars of this I did not 
think it neceflary to introduce in the above extrail. 
A SECOND SET OF OBSERVATIONS. 
Feb. 3, 1777, the cylinder was excited, and from the 
5th to the 1 4th no fire had been made in the ftudy. 
Day. 
Hour. 
Diflajiee at which th« 
balls diverge. 
I 4 ^ 
3 
P. M, 
7 inches. 
J! 
TO 
B. M* 
0 
1 5 
9 
A. M* 
1 1 
(b) Thisvwas the firft time, fince Augufl or September* that I had obferved 
<my cylinder to retain its attra&ive power longer than twelve hours alter being 
excited, though it was conftantly ke; t in the fame place, and, as well as I caa 
obfery.e, under the very fame circuipftancss. 
