relating to Atmospherical Electricity. 
2 39 
Days. 
Wind. 
Barom. 
Ther. 
Sparks. 
Pos. 
Neg. 
Sept. 4 
W 
Inches. 
29.65 
NW 
N 
29.70 
3 °- 
8 
9 
10 
1 1 
12 
13 
H 
IS 
N 
N 
SW 
NW 
SW 
SW 
W 
S 
SW 
30.10 
3 °- 5 
30. 8 
3 ° - 
30. 1 
30.10 
3 °- 
29.84 
29.80 
58 
strong 
pos. 
55 
58 
5i 
57 
62 
58 
5 i 
62 
61 
62 
66 
small 
strong 
small 
Q. 
O 
o 
o 
o 
o 
o 
small 
pos. 
neg. 
pos, 
pos. 
pos. 
pos. 
pos. 
pos. 
pos. 
pos. 
pos. 
came weaker and weaker, till it ended as 
it began, negative. This electric charge 
of the rod continued near one hour and 
a half. 
A.M. One o’clock P.M. wind NW. 
Thin white clouds have been passing 
over the rod ; but a distinct black 
cloud is now approaching, and some 
rain falls, mixed with hail ; the rod is 
now highly charged with positive elec- 
tricity ; the bell rang loud, and a long 
time ; and as the shower abated, so did 
the strength of the electric charge abate 
in the rod. This charge lasted near 
three hours, without change of kind. 
A quarter before three o’clock P.M. some 
rain fell, by which the rod became mo- 
derately charged positively, but soon 
changed to a weaker negative. There 
were two more gradual changes of elec- 
tricity within the space of one hour. 
Three o’clock P.M. a large dark cloud 
passed over the rod with drizzling rain ; 
its electricity was negative ; the bell 
rang weakly. The electric charge from 
this cloud began, continued, and ended, 
negative. 
A.M. by the night bottle. Two o’clock 
P.M, a dark cloud, with drizzling rain, 
passed over the rod, by which it was 
electrified positively, with sparks ; and 
ended negative. 
Moderate fine weather, and a weak 
electricity. 
The rod has been electrified positively 
nearly all this day. At five o’clock P.M. 
an awful darkness covered the heavens, 
until near six o’clock, succeeded by a 
drizzling rain, from which I could not 
obtain (in my common way) any elec- 
tric fluid : but when the dark cloud 
became broken, and no rain fell, I then 
obtained visible sparks at the ball N, 
which continued until I went to bed ; 
I i 2 
