176 
MR. GEAISHER ON THE RADIATION OF HEAT, 
Table LXXXII. 
General state of the shy 
during the night previous to 
reading the instruments. 
1843. 
August. 
Day and 
hour of 
reading. 
Reading of 
thermo- 
Excess of the reading of the thermometer in air, at the height of 4 feet 
and protected from the effects of radiation, above that placed 
meter in 
air at the 
height of 
4 feet. 
On long 
grass ex- 
posed to 
•fths of sky. 
On short 
grass. 
One inch 
high. 
Three 
inches 
high. 
In focus of 
metallic 
reflector. 
Cloudless. 
d h 
6 21 
48-7 
O 
4-7 
o 
6-9 
O 
7-2 
O 
7-4 
O 
7-3 
10 21 
47-2 
6-4 
12-2 
13-0 
13-0 
9-4 
11 21 
51-0 
6-2] 
9-0 
9-1 
9*5 
9*0 
12 21 
49*7 
6-7 
13-7 
12-9 
13-3 
9-9 
17 21 
59-6 
6-0 
11-0 
11-6 
11-0 
9-0 
18 21 
59-0 
5-0 
11-0 
11-0 
11*4 
10-0 
Principally cloudless. 
1 21 
49-4 
2*8 
4 # 5 
4-6 
4-6 
6*5 
5 21 
53-6 
3-6 
4-6 
4-6 
4-4 
6-4 
7 21 
60-0 
7-0 
8-8 
9-0 
8-0 
11-8 
9 21 
57*5 
6-2 
6-8 
6-7 
6-9 
5-0 
13 21 
58-6 
5-8 
8*8 
8-4 
8-9 
10-4 
16 21 
56*8 
4-8 
7-5 
7-3 
7*4 
7-6 
20 21 
50*2 
4-0 
6-6 
6-2 
6-8 
8-2 
21 21 
51-0 
3-0 
6-8 
6-8 
7-6 
9-2 
22 21 
49*5 
2-8 
4-5 
4-5 
4-7 
6-0 
24 21 
50-0 
5*6 
9-7 
9-4 
10-0 
9-8 
26 21 
49-2 
4-9 
8*0 
8-1 
8-8 
7*5 
31 21 
56-2 
5-4 
8-0 
8-4 
8*5 
8-2 
Half-cloudy. 
3 21 
56-0 
3-2 
9-0 
4-0 
8-0 
5*8 
4 21 
52-6 
4-5 
4-5 
5-0 
5-0 
6-6 
14 21 
61-8 
6-4 
4-0 
6-8 
4-0 
5-8 
15 21 
61-8 
4-0 
7-0 
6-8 
7*0 
7-9 
19 21 
62-0 
3-9 
7-3 
7*0 
7*5 
8-1 
25 21 
58*4 
1-8 
6-0 
5-6 
6-3 
5-9 
27 21 
62-0 
4-0 
3-7 
3-7 
3-7 
5-0 
Principally cloudy. 
8 21 
59-3 
3-2 
5-6 
5-5 
5-8 
6-1 
30 21 
59-5 
7-0 
8-4 
8*2 
8-8 
8-0 
Cloudy. 
23 21 
53-9 
0-7 
1-3 
1-4 
1*2 
3-9 
29 21 
61-0 
2-3 
1-2 
1-7 
2-2 
3-8 
