201 
AT NIGHT, FROM THE EARTH, ETC. 
readings of a similar thermometer placed on different substances, in each 
state of the sky. 
from the effects of radiation, above that of a similar thermometer fully exposed to the sky, placed 
In air six inches 
high. 
On white raw 
wool. 
On fine flax. 
On coarse flax. 
On white 
un wrought cotton 
wool. 
On lead. 
On blackened tin. 
On white tin. 
In focus of 
metallic parabolic 
reflector. 
Mean 
Number 
Mean 
Vumber 
Mean 
dumber 
Mean 
dumber 
Mean 
Number 
Mean 
Number 
Mean 
dumber 
Mean 
N umber 
Mean 
dumber 
excess. 
nights. 
excess. 
nights. 
excess. 
nights. 
excess. 
nights. 
excess. 
of 
nights. 
excess. 
of 
nights. 
excess. 
nights. 
excess. 
nights. 
excess. 
nights. 
0 
o 
o 
10-1 
n 
105 
2 
10-3 
7 
10-1 
2 
91 
6 
9-2 
11 
1 17 
7 
ii o 
7 
lb-o 
7 
9-4 
7 
6‘6 
8 
12-3 
5 
11-5 
6 
123 
5 
11-9 
4 
8-5 
6 
0 
0 
o 
6 
0 
. . « 
13-4 
1 
10-6 
1 
9-6 
l 
8-9 
i 
8-0 
2 
8-8 
4 
9-1 
4 
7-6 
4 
7-7 
4 
7 0 
4 
11-2 
7 
9-8 
7 
5-9 
7 
6-5 
7 
15-3 
18 
16-2 
18 
9-2 
18 
8-0 
18 
11 -.9 
10 
13-2 
10 
9-6 
4 
8-1 
10 
8-3 
4 
7-8 
4 
6-8 
6 
12-3 
9 
13 1 
9 
8-2 
12 
8-6 
12 
9-8 
12 
7-1 
12 
126 
12 
9-7 
12 
12-4 
8 
6-8 
8 
9-7 
2 
60 
2 
12-3 
6 
9-3 
6 
74 
6 
7-8 
4 
7-6 
6 
8-4 
10 
8-1 
12 
9-2 
11 
31 
80 
8-8 
2 
93 
2 
8-9 
2 
8-6 
2 
66 
8 
9-5 
7 
9-1 
7 
9-5 
5 
8-0 
5 
71 
7 
7-6 
5 
7-0 
5 
5-9 
5 
4-9 
5 
61 
5 
10-8 
7 
8-6 
7 
8-0 
7 
7-3 
7 
4-6 
7 
7-9 
6 
7-9 
6 
70 
6 
6-8 
6 
5-5 
6 
7-5 
2 
7-8 
2 
5-2 
2 
4-9 
2 
131 
4 
14-5 
4 
101 
4 
7-4 
4 
11-4 
4 
91 
4 
60 
5 
10-3 
4 
10-4 
5 
77 
5 
129 
1 
131 
1 
71 
1 
8-1 
6 
8-3 
6 
7-5 
6 
12-5 
4 
8-6 
5 
10-4 
6 
8-8 
6 
101 
7 
8 1 
7 
71 
1 
8-2 
1 
5-3 
8 
51 
4 
5-5 
9 
6-6 
7 
6-5 
7 
7-2 
7 
4-2 
30 
5-4 
2 
4-6 
2 
4-8 
2 
4 0 
2 
5 0 
5-4 
6 
6-5 
6 
80 
4 
8-6 
1 
4-8 
2 
4-6 
1 
6-9 
1 
7-3 
1 
5-9 
i 
5-9 
1 
7-9 
1 
9-1 
5 
5-4 
5 
6-8 
5 
5-4 
5 
4.4 
5 
4-2 
6 
5-0 
6 
51 
6 
4-5 
6 
3 7 
6 
6-7 
8 
6-9 
8 
5-3 
8 
4-4 
9 
8-2 
3 
8-8 
3 
4-6 
3 
3-4 
3 
8-7 
4 
8-4 
4 
5-9 
6 
7-9 
2 
6-6 
4 
5 0 
7 
8-1 
3 
8-3 
3 
6-3 
5 
110 
4 
11-9 
4 
7-5 
5 
12-6 
10 
120 
2 
9-3 
6 
60 
6 
8-9 
6 
7-6 
6 
0 
... 
0 
2 D 
MDCCCXLVII 
