188 
MR. GLAISHER ON THE RADIATION OF HEAT. 
Table XCIV. 
General state of the 
sky during the nigh 
previous to reading 
the instruments. 
1844. 
August. 
Day and 
hour of 
reading. 
Reading 
of thermo- 
meter in ai 
at the 
height of 
4 feet. 
Excess of the reading of a thermometer in air, at the height of 4 feet 
and protected from the effects of radiation, above that placed 
r 
On long 
grass. 
On short 
grass. 
On flax. 
On white 
raw wool. 
In focus of 
metallic reflector. 
d h 
o 
O 
Cloudless. 
1 21 
45‘6 
7-9 
5-5 
7-1 
6-8 
6-6 
2 21 
52-8 
11-3 
9-8 
11-3 
12-6 
8-2 
7 21 
50-9 
4-3 
5-6 
6-7 
6-5 
7*3 
8 21 
49-2 
6-2 
6-7 
8-6 
8-7 
7-4 
13 21 
52-8 
11-6 
5-3 
6-6 
6-3 
4-1 
14 21 
49-0 
8-0 
3-5 
8-5 
8-0 
4-9 
18 21 
45-4 * 
8-6 
6-9 
8-4 
11-1 
6-7 
27 21 
42*8 
11-0 
10-0 
12-0 
8-0 
28 21 
44-6 
9-3 
8-8 
12-5 
7'8 
29 21 
46-8 
10-0 
10-1 
13-9 
9*5 
30 21 
46-2 
10-5 
9-3 
11*9 
7-5 
31 21 
46-3 
8-5 
7-8 
10-6 
6-7 
Principally 
4 21 
49-7 
9-5 
5-3 
7-7 
8-4 
9-4 
cloudless. 
6 21 
52-3 
6-3 
5-3 
5-3 
6-3 
6-5 
13 21 
50-3 
7*7 
4-8 
7-4 
6-8 
7-8 
17 21 
47*3 
7-1 
6-1 
9-6 
7*1 
6-9 
22 21 
48*2 
8-3 
6-4 
9-4 
8-5 
6-7 
23 21 
47'5 
9*7 
8*3 
10*5 
11-7 
7-8 
Half-cloudy. 
3 21 
54-2 
4-6 
4-5 
16-6 
14-0 
7-2 
9 21 
47-8 
QO 
6-3 
7-8 
7-8 
8-6 
10 21 
45-3 
1M 
8-1 
12-3 
11-3 
8-8 
16 21 
57-2 
5-4 
26 21 
51-2 
10-0 
6-7 
10-9 
7-7 
Principally'! 
cloudy. J 
20 21 
51-6 
6-4 
5-3 
5-9 
5-8 
7-9 
Cloudy. 
5 21 
57-8 
10-8 
11-6 
11-6 
13-6 
3-3 
11 21 
56-2 
4-2 
4*2 
3-7 
12 21 
54-5 
3-2 
3-0 
4-8 
5-8 
5-4 
19 21 
57*7 
0-9 
0-7 
0-9 
1*0 
1-1 
21 21 
52-8 
3-0 
2-6 
6-0 
3-5 
3-8 
24 21 
52-3 
7-6 
5-8 
7-3 
8-5 
6-5 
25 21 
52-4 
4-4 
3-2 
5-3 
9-1 
