238 
Mr. Read's Meteorological Journal 
Days. 
Wind. 
Barom. 
Ther. 
Sparks. 
Pos. 
Neg. 
Inches. 
O 
Aug. 17 
W 
3°. 
66 
O 
pos. 
18 
N 
30.1° 
66 
O 
pos. 
— 
19 
SW 
30. 1 
66 
O 
pos. 
— 
20 
NW 
3 °- 4 
76 
O 
pos. 
— 
21 
S 
29.75 
77 
strong 
pos. 
22 
w 
3 °- 4 
62 
0 
pos. 
23 
SW 
29.95 
67 
0 
— 
neg. 
24 
w 
3°- 
6 3 
0 
pos. 
— 
25 
SW 
29. q6 
62 
0 
pos. 
— 
26 
N 
29.70 
64 
O 
pos. 
— 
27 
N 
29.83 
62 
strong 
pos. 
— 
28 
W 
29.95 
59 
O 
pos. 
— 
29 
NW 
3°- 
60 
O 
pos. 
— 
3 ° 
W 
3°. 12 
62 
0 
pos. 
— 
3 1 
SW 
30.10 
66 
O 
pos. 
— 
Sept. 1 
w 
29.95 
67 
0 
pos. 
— 
2 
SW 
29.80 
62 
small 
pos. 
3 
w 
29.50 
58 
strong 
pos. 
rain this day, some of them not sensibly 
electrified, others were weakly positive, 
but which I could not distinguish from 
the common electricity of serene wea- 
ther, which has prevailed a long time. 
} Serene weather ; divergency of the 
pith balls from one to seven-tenths of 
an inch. 
A.M. Five o’clock P.M. fell some large 
drops of rain, by which the rod was 
highly charged positively ; the bell rang 
briskly about five minutes, then stop- 
ped, and the electricity of the rod be- 
came negative. The rain now ceased, 
the sky cleared up, and the electric 
charge in the rod decreased considerably, 
and ended as it begun, positive. 
Dark cloudy weather, and a very moist 
air, attended with a weak electricity. 
This day has been very showery, yet only 
one shower was strongly electrified. 
Serene weather, and a constant elec- 
tricity. 
A.M. In the afternoon, there was a thick 
dark sky, with small rain, and a strong 
wind. On an increase of rain the elec- 
tricity became negative, with small 
sparks. When the rain abated, the elec- 
tricity changed to positive, and so it 
ended. 
A.M. Near one o’clock P.M. the elec- 
tric charge in the rod was negative. I 
then saw thunder-clouds forming in the 
south, and in the north. Some large 
drops of rain now fell, by which the 
charge in the rod became very strong ; 
the bell now rings faintly, and the pith 
balls exhibit their waving motion, and 
sometimes sudden jerks. The distinct 
thunder-cloud, which was in the north, 
is now gone by the west into the south, 
during which the charge in the rod be- 
