3 8 7 
Mr . Wilson’s farther Experiments on Cold. 
Monday morning, January 22, 1781. 
Thermometer 
Thermometer 
h. 
m. 
in air. 
on fnow. 
I 
- 
O 
- 
- 12 . 
I 
3 ° 
- 
4 * 2 
- 
- I 2 
I 
45 
« 
0 
- 
- 8 
2 
- 
- 2 
- 
“ 7 
3 
- 
0 
- 
- 4 
3 
45 
- 
0 
- 
- 8 
4 
- 
- 1 
mi 
- 1 2 
4 
3 ° 
- 
“ 3 
- 
- 8 
5 
- 
- 2 
- 
- 12 
6 
15 
- 
”3 
- 
~ l 3 
6 
45 
- 
- 2 
- 
— 10 
7 
- 
— T ^ 
1 J 
7 
3 ° 
Wt 
- 2 
- 
- IO 
8 
- 
“4 
- 
- I I 
8 
30 
- 
- 2 
— IO 
From one o’clock till three in the morning the thermometer 
in air at the baluflrade of the eaft wing of the Obfervatory 
pointed from +4 to +6, and on the fnow there from - 2 to 
o. At half an hour after one the thermometer in air, twenty- 
four feet from the ground,, and to the windward of the houfe, 
pointed to + 7, and at eight o’clock to + 1. At three o’clock 
the fnow in the park, three inches below the furface, raifed the 
thermometer to + 14, and at fix inches below, near the ground,, 
to + 24. The barometer Hood at 29.8 inches, and there was a 
perceptible motion of the air from the eafi: and one point fouth. 
This night was a very general and lively aurora borealis, moil 
z part 
