184 
MR. GLAISHER ON THE RADIATION OF HEAT, 
Table XC. 
General state of the 
sky (luring the night 
previous to reading 
the instruments. 
1844. 
April. 
Day and 
hour of 
reading. 
Reading of 
thermo- 
meter in 
air 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 
On long 
grass. 
On short 
grass. 
On flax. 
On white 
raw wool. 
On lead. 
In focus of 
metallic 
reflector. 
Cloudless. 
d h 
1 21 
3(r4 
o 
7-9 
o 
8-4 
13-2 
] i-2 
6-7 
6-8 
2 21 
41-6 
12-9 
13-4 
19-4 
17-6 
12-9 
9-4 
3 21 
43-4 
13-4 
11-4 
19-9 
18-9 
16*4 
8-4 
4 21 
44-4 
11-4 
11-1 
14-4 
14*4 
6-9 
5-4 
5 21 
40-4 
11-4 
9-2 
14-6 
13-4 
4*6 
7-3 
6 21 
34-4 
10-9 
8-9 
13-6 
12-4 
6-4 
5-1 
7 21 
33-4 
11-3 
11-8 
15-4 
16-9 
7-9 
10-7 
8 21 
39-4 
10-2 
9-9 
16-2 
15-8 
8-4 
6-1 
9 21 
41-2 
11-7 
10-7 
13-4 
13-2 
8*7 
6-5 
10 21 
38-3 
13-1 
11-6 
18-0 
16-8 
9-5 
8-7 
16 21 
41-9 
10-7 
9-7 
15-3 
15-0 
7-8 
5-5 
17 21 
44-6 
1M 
10-6 
16-6 
15-3 
8-6 
5-3 
18 21 
37-0 
12-6 
10-1 
15-3 
14-4 
10-0 
9-7 
24 21 
39 4 
14-9 
13-6 
19-9 
20-4 
12-4 
12-4 
25 21 
41-4 
13-4 
12-6 
19-2 
17*8 
10-4 
10*2 
28 21 
35-7 
11*7 
11-4 
18*1 
15*4 
9-5 
10-7 
29 21 
39-4 
10-4 
8-7 
14-2 
12-6 
9-0 
9-4 
30 21 
40-7 
12-5 
10-5 
14-4 
14-2 
10-2 
6-3 
Principally 
19 21 
48-2 
11-0 
10-1 
15-1 
12-6 
12*2 
7*0 
cloudless. 
22 21 
45-1 
12-1 
10-9 
19-1 
16-5 
13-6 
8-3 
23 21 
41-4 
8-4 
6-4 
10-4 
11*5 
6-2 
6-2 
27 21 
37*1 
9-8 
9’2 
13-4 
12-0 
8-5 
8-1 
Half-cloudy. 
14 21 
43-9 
5-7 
5-4 
8-7 
8-6 
4-8 
3-1 
15 21 
48-6 
6-6 
6-1 
8-4 
8-5 
4-0 
4-2 
21 21 
43-6 
6-4 
6-6 
9-4 
7*6 
5-6 
2-8 
Principally 
11 21 
42-0 
10-0 
8-8 
14-0 
14-0 
6-8 
7-8 
cloudy. 
20 21 
51*1 
8-9 
9-0 
12-3 
10-5 
11-1 
6-8 
Cloudy. 
12 21 
46-4 
2-4 
2-5 
5*1 
6-0 
2-1 
2 1 
13 21 
48-7 
4-9 
5-1 
8-4 
7-7 
5-3 
3-1 
26 21 
46-1 
0-6 
0-1 
1*3 
2-0 
0*4 
1*1 
