relating to Atmospherical Electricity. 
2 53 
Days. 
Wind. 
Barom. 
Ther. 
Sparks. 
Pos. 
Neg. 
April 24 
sw 
Inches. 
29.31 
0 
54 
strong 
1 
neg. 
extensive black cloud, without any 
bre:.ks in it, approached the rod, by 
which it became strongly electrified, ne- 
gatively ; and in the space of twelve mi- 
nutes a most awful darkness filled the 
atmosphere, and some rain fell, mixed 
with hail. The electric charge in the 
rod now became positive ; and for the 
space of ten minutes it was as strongly 
electrified as it possibly could be ; for 
I now counted 172 spontaneous explo- 
sions between the brass ball and bell; 
the bell ringing briskly all the time. 
These lucid sparks succeeded each other 
almost too quick to be noted. When the 
explosive sparks ceased, the electricity of 
the rod changed, and ended as it had 
begun, negative. A little after five 
o’clock fell a heavy shower of rain, and 
a second strong charge in the rod suc- 
ceeded, attended with three gradual 
changes of kind. 
A little after two o’clock P.M. fell a 
2 5 
w 
29.84 
5i 
strong- 
pos. 
shower of rain, by which the rod be- 
came moderately electrified, negatively. 
The bell rang weakly. This charge in 
the rod continued four hours, without 
change of kind. 
A.M. Three o’clock P.M. fell a shower 
26 
27 
E 
NE 
3 °- 
29.84 
53 
53 
0 
0 
pos. 
pos. 
— 
of rain, which was rather strongly elec- 
trified, negatively, attended with three 
changes of kind. 
1 Serene foggy weather. 
28 
29 
N 
N 
29.81 
29 86 
5 2 
5i 
0 
strong 
pos. 
neg. 
J 
A.M. from a shower of rain. 
3° 
N 
2Q.QO 
4 S 
small 
— 
neg. 
During the greatest part of the day. The 
May 1 
N 
29.80 
48 
small 
pos. 
_ 
weather showery. 
A.M. Afternoon negative. The weather 
2 
N 
29.85 
48 
small 
■ 
neg. 
still showery. 
A.M. A mild showery morning. 
3 
N 
3°* 
45 
0 
pos. 
— 
A.M. butveryweak. Fair weather to-day. 
4 
N 
3 °- 
45 
0 
pos. 
— 
The atmospherical electricity has been so 
5 
6 
N 
N 
29.96 
3°- 
47 
46 
0 
0 
pos. 
pos. 
— 
1 
very weak this day, that I was obliged to 
connect, with the hand-rod, a lighted 
torch, to ascertain the kind of electricity. 
F air serene weather these four days ; and 
7 
N 
30.28 
45 
0 
pos. 
— 
y the atmospheric electricity constant. 
8 
N 
3°-3 2 
48 
0 
pos, 
— 
MDCCXC 1 1 . LI 
