relating to Atmospherical Electricity. 
23 5 
Days. 
Wind. 
Barom. 
Ther. 
Sparks. 
1 
Pos. 
Neg. 
June 27 
N 
Inches. 
29.96 
O 
6l 
strong 
pos. 
— 
28 
W 
3 °- 5 
57 
O 
pos. 
29 
N 
3 °- 
70 
O 
pos. 
— 
30 
SW 
3 °- 
67 
O 
pos. 
— 
July 1 
w 
29.83 
66 
small 
pos. 
— 
2 
w 
29.77 
6 3 
strong 
pos. 
3 
NW 
29.72 
70 
0 
pos. 
4 
SW 
29.66 
69 
0 
pos. 
— 
5 
SW 
29.40 
64 
strong 
neg. 
6 
N 
29.70 
6 5 
0 
1 
neg. 
7 
N 
30.10 
6 3 
0 
— 
neg 
8 
SW 
30 - 
6 3 
0 
pos. 
— 
9 
SW 
29.86 
67 
0 
— 
neg. 
10 
SW 
29 90 
61 
strong 
pos. 
— 
the bell and brass ball N in quick suc- 
cession. These sparks were about two 
inches long. 
A.M. Four o’clock P.M. I saw heavy 
clouds forming ; and as they came 
nearer and nearer, the rod became more 
powerfully electrified with negative 
electricity. It now began to rain, by 
which the rod became intensely elec- 
trified indeed. Many dense sparks now 
struck through the air, between the bell 
and brass ball N, with a loud report for 
so small an opening of two inches only. 
There were six changes of electricity in 
two hours. 
1 
Mild foggy weather ; rtioderately elec- 
J trifled. 
A.M. Negative P.M. with small sparks. 
A.M. Half after twelve o’clock P.M. a 
sudden gust of wind sprung up, fol- 
lowed by a shower of rain, which elec- 
trified the rod positively, and sufficient 
to emit small sparks ; which soon after 
wards became negative. Near four 
o’clock P.M. a very large black cloud 
passed over the rod, and let fall a little 
rain mixed with hail, by which the rod 
became highly electrified negatively: the 
bell now rang briskly, till a flash of 
lightning and instant crack of thunder 
happened, which occasioned a sudden 
change in the electricity to positive : 
then the bell struck up again as brisk 
as before. The rod has been charged ten 
hours without intermission this day. 
A.M. A cloudy atmosphere, but fair. 
A.M. Dull heavy weather. 
This day has been showery and sun- 
shine by turns. The rod has been 
rather strongly electrified, and there 
have been four gradual changes of elec 
tricity. The bell rang briskly a long 
time. This charge lasted full five hours 
\ A strong gale of wind with rain, and 
J a weak electricity. 
A.M. 
A.M. A thick moist air. 
A.M. Near five o’clock P.M. there was 
