182 
MR. GLAISHER ON THE RADIATION OF HEAT, 
Table LXXXVIII. 
General state of the 
1844. 
February. 
Reading of 
thermo- 
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 
sky during the night 
previous to reading 
the instruments. 
Day and 
hour of 
reading. 
meter in 
air at 
the height 
of 4 feet. 
On long 
grass. 
On short 
grass. 
On flax. 
On white 
raw wool. 
On black- 
ened tin. 
On white 
tin. 
In focus of 
metallic 
reflector. 
Cloudless. 
d h 
o 
1 21 
27-2 
8-6 
5*7 
6*6 
9-0 
7*6 
8*0 
6*4 
15 21 
33-0 
11-6 
8*8 
12*0 
9-8 
9-2 
10*9 
7'8 
16 21 
34-0 
7-7 
6*5 
6*9 
6*7 
6*0 
5*0 
6*2 
22 21 
22*2 
10*4 
7-5 
10*8 
9-8 
7*7 
7*0 
7-7 
Principally 
4 21 
29-0 
7*5 
6*0 
6*0 
10*2 
10*0 
10*0 
6*0 
cloudless. 
6 21 
25-4 
8*2 
6*6 
11*6 
6*8 
8*4 
6*6 
7*1 
7 21 
32-2 
5-5 
5*0 
9*7 
6*0 
5*2 
4*7 
3*4 
8 21 
32-7 
7-1 
5*5 
5*3 
8*7 
6*4 
6-5 
3*6 
19 21 
29-7 
8-4 
6*2 
7-8 
6*7 
5*8 
7-0 
6*7 
20 21 
27-3 
8-5 
5*3 
6*7 
9-0 
6*3 
6*1 
6*3 
Half-cloudy. 
17 21 
36*7 
7*5 
5*3 
5*2 
3*7 
4*7 
4-7 
4*5 
18 21 
40-6 
5*4 
6*2 
4*0 
2*8 
5*1 
1*5 
3*8 
24 21 
33 4 
8*2 
5*8 
7*2 
8*6 
6*9 
6*4 
6*4 
25 21 
39-5 
6*6 
5*2 
4*9 
3*7 
5*5 
5*9 
3*0 
27 21 
29-2 
3*8 
1*0 
4*4 
2*7 
3*1 
2*9 
1*2 
28 21 
32-2 
5*9 
3*9 
4*2 
3*7 
5*1 
5*6 
3*2 
Principally 
6 21 
32-0 
7-2 
5*7 
9-0 
8*0 
6*2 
5*7 
3*2 
cloudy. 
9 21 
32-2 
2*8 
2*8 
4*5 
3*6 
4*4 
4*0 
1*4 
10 21 
31-7 
6*5 
4*5 
4*7 
4*7 
5*2 
4*7 
3*9 
12 21 
24-5 
6*2 
3*5 
9-6 
7-0 
4*5 
3*7 
4*3 
13 21 
20-0 
6*0 
2*0 
11*0 
12*2 
4*0 
5*2 
3*4 
26 21 
27 -o 
4*9 
1*8 
5*7 
5*4 
4*8 
4*5 
2*6 
Cloudy. 
2 21 
28-0 
3*0 
2*0 
4*0 
3*0 
6*5 
7*0 
3*0 
3 21 
28-0 
2*7 
4*3 
4*0 
3*0 
10*0 
6*0 
2*2 
11 21 
30-2 
6*0 
6*0 
4*1 
7*2 
5*2 
4-7 
4*7 
14 21 
36-8 
8*5 
7-6 
13*8 
14*8 
7-3 
6*8 
7-5 
21 21 
32-0 
0*2 
0*3 
0*5 
—0*2 
1*4 
0*4 
-1*5 
23 21 
31*2 
4*2 
3*2 
4*8 
3*7 
4*4 
4*0 
5*2 
29 21 
38-8 
3*0 
1*6 
4*3 
1*5 
3*4 
3*1 
1*8 
