relating to Atmospherical Electricity. 
233 
Days. 
Wind. ' 
Barom. 
Ther. 
Sparks. 
Pos. 
Neg. 
June i 
s 
Inches. 
3°. 12 
0 
58 
O 
pos. 
_ 
1 
2 
N 
30.16 
69 
O 
pos. 
— 
| 
3 
SW 
30.12 
66 
O 
pos. 
— 
Serene fine weather. 
4 
5 
N 
N 
20. 8 
30.18 
61 
58 
O 
O 
pos. 
pos. 
— 
1 
J 
6 
N 
30.16 
62 
O 
pos. 
— 
A.M. Two o’clock P.M. the sky still 
7 
W 
3°- 
62 
O 
pos. 
clear ; the electricity of the rod was 
now negative, and continued so two 
hours. During this time, the rod was 
only electrified with its own electricity', 
or what has been termed influentially 
electrified ; for I found by trying both 
extremities of the rod, that they were 
in contrary states of electricity. 
A.M. A warm moist air. 
8 
SW 
29.91 
66 
O 
pos. 
— 
A.M. Some mizzling rain. 
9 
s 
29.65 
64 
O 
pos. 
— 
A.M. 
10 
SW 
26.60 
6 5 
strong 
pos. 
— 
A cioudy morning. Half after one o’clock 
1 1 
N 
29.90 
6 5 
0 
pos. 
1 
P.M. the electric charge in the rod be- 
came negative. In a short time after, 
some rain fell, and the electricity again 
became positive, and very strong ; the 
bell now rang slowly, and soon stop- 
ped ; the pith balls closed and opened 
negative, and continued so a full hour : 
the balls exhibited one sudden jerk 
during that time. This charge of the 
rod lasted two hours. During the pas- 
sage of a cloud over the rod, in the 
morning of to-day, I found it influen- 
tially electrified. 
12 
N 
3°- 
59 
0 
pos. 
— 
The weather serene and clear. The 
J 3 
NE 
30.29 
60 
0 
pos. 
— 
electricity varying between nothing 
H 
NE 
30.30 
64 
O 
pos. 
— 
and the balls seven-tenths of an inch 
15 
NE 
30.30 
69 
0 
pos. 
— 
open. 
16 
N 
30.23 
54 
0 
pos. 
— 
17 
E 
30.10 
61 
strong 
— 
neg. 
After a course of clear serene weather. 
this day has been dark, and hazy. 
Nine o’clock P.M. wind S, a prodi- 
gious large cloud approached the rod, 
and a little rain fell, yet there were no 
signs of electricity in the rod. In a few 
minutes after this, I was surprised by 
hearing the bell ring ; I ran to the ap- 
paratus, and found it highly charged 
negatively. When the main bulk of 
the cloud arrived over the rod, its elec- 
tricity changed to a strong positive ; 
