relating to Atmospherical Electricity. 
231 
Days. 
Wind. 
Barom. 
Th 1 
Sparks. 
Pos. 
Meg. 
Inches. 
O 
hail ; the rod was now highly charged 
positively, the bell rang briskly, but 
soon stopped, while the electricity 
changed to a strong negative ; then it 
began to ring again, for about ten mi- 
nutes, after which all signs of electricity 
ceased in the rod for a few minutes. Af- 
terwards the rod became rather strong- 
ly charged for two hours, and changed 
once in that time. During this high 
charge of the rod, the bell (which is 
connected by metal with the moist 
ground) was in a contrary state of elec- 
tricity to that of the insulated part of 
the apparatus ; and also the air in the 
room, the window-shutter nearest the 
bell, and even the bricks in the wall, 
were all electrified sufficiently to indi- 
cate the kind. 
May 21 
sw 
29.98 
58 
strong 
pos. 
A.M. by the night bottle, which had 
been charged while I slept. Four o’clock 
P.M. a low cloud approached the rod, 
and dropped a little rain, by which it 
became electrified strongly negative. 
This electrification of the rod lasted 
near four hours, and changed three 
times in kind. 
22 
E 
29.IO 
56 
0 
pos. 
A.M. One o’clock P.M. wind S, a small 
rain fell, and the air being very moist, 
has lessened considerably the insulation 
of the rod. 
23 
S 
29.90 
5 6 
0 
pos. 
— 
The air is dry to-day, but the clouds are 
very high. 
Six o’clock A.M. Nine o’clock some 
rain fell, which increased the negative 
charge in the rod. The rain now falls 
more copiously, and the balls close and 
open gradually with positive electricity, 
which was rather strong for a short time. 
The balls again gradually close and 
open, without change of kind. The rod 
has been electrified near 14 hours this 
day. In the morning of to-day, at 
Lewes in Sussex, much lightning and 
thunder. 
24 
NE 
29.IO 
69 
strong 
neg. 
25 
NE 
29. 4 
70 
0 
— 
neg. 
A.M. A moist air, and wet morning. 
26 
E 
29.95 
62 
strong 
pos. 
A dark cloudy morning. Three o’clock 
P.M. on the approach of a heavy dark 
cloud, a few drops of rain fell, by which 
H h 2 
