178 
MR. GLAISHER ON THE RADIATION OF HEAT 
Table LXXXIV. 
General state of the 
sky during the night 
previous to reading 
the instruments. 
1843. 
October. 
Day and 
hour of 
reading. 
Reading 
of ther- 
mometer 
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. 
One inch 
high. 
Three 
inches 
high. 
Six 
inches 
high. 
In focus 
of me- 
tallic 
reflector. 
On 
white 
cotton 
wool. 
On 
white 
raw 
wool. 
On 
coarse 
flax. 
On 
fine flax. 
Cloudless. 
d h 
16 21 
32-3 
o 
7-8 
o 
7*2 
O 
5-8 
o 
5-2 
8-6 
O 
O 
o 
• 
18 21 
28-5 
10-0 
9-0 
8-5 
11-0 
12-3 
14-0 
13-0 
17-3 
19 21 
28-9 
8-2 
6-9 
5-2 
5*0 
9-1 
11-9 
11-6 
1M 
21 21 
37'5 
7*3 
5*6 
4-5 
5-3 
7-0 
10-0 
8-0 
9-5 
23 21 
47*9 
5*1 
3-7 
2-7 
4-7 
9-9 
13-7 
5-7 
7-1 j 
25 21 
29*3 
7-5 
6*3 
5*7 
6-1 
9-3 
10-3 
10-3 
10-8 
26 21 
32-3 
6-8 
4-2 
4-2 
4-6 
6-8 
8-5 
8-1 
7'8 
! 
29 21 
40-1 
11-2 
8-1 
6-3 
7-6 
11*3 
13-6 
13-4 
13-4 
Principally 
3 21 
56'3 
8-0 
6-3 
5-3 
3-5 
4-1 
cloudless. 
5 21 
51-3 
5-7 
5-9 
3-3 
1-3 
4-3 
9 21 
39-1 
8-5 
8-2 
7-1 
3-1 
5-9 
12 21 
34-9 
6-7 
5*4 
3-7 
2-4 
6*4 
14 21 
31-0 
9*7 
9-3 
7-5 
3-8 
10-3 
15 21 
29-7 
9-9 
9'2 
9-3 
4-6 
10-3 
22 21 
46-3 
10*1 
8-3 
7*6 
9-5 
9-5 
10-1 
9*3 
10-1 
28 21 
34-5 
5-7 
4-2 
3*2 
5-7 
7-7 
7*5 
8-5 
8-5 
| Half-cloudy. 
1 21 
55-8 
5-5 
5-3 
3-8 
3-3 
5-3 
2 21 
50-0 
8-2 
8-1 
5-9 
3-8 
8-0 
4 21 
54-3 
9-7 
8-9 
7-8 
4*4 
7*3 
6 21 
56-9 
6-2 
5-7 
5-9 
4-3 
4-7 
17 21 
36-5 
5-5 
3-5 
3*0 
4-6 
6-2 
8*0 
7-0 
6-5 
24 21 
46-5 
2-9 
2-0 
2-3 
2-3 
1-7 
2-7 
2-6 
2-7 
| Principally 
7 21 
58-0 
4-8 
3-0 
3*0 
3-0 
2-8 
cloudy. 
13 21 
36-6 
8*1 
6-4 
4-9 
3-6 
6-0 
27 21 
38-5 
7-0 
2-5 
2-5 
5-0 
6*5 
2-5 
2*5 
2-5 
Cloudy. 
8 21 
48*5 

0-9 
j 
10 21 
46-9 
0-7 
0-9 
0-9 
1*7 
0-7 
11 21 
42-3 
7-3 
5-0 
3-8 
2-3 
6-4 
20 21 
38-3 
3-3 
0-6 
—0-5 
3-8 
2-8 
6-3 
5-9 
5-8 
30 21 
51-1 
6-9 
1-8 
1-6 
1-6 
| 
31 21 
42-5 
0-3 
0-2 
0-0 
1*0 
