172 
MR. GLAISHER ON THE RADIATION OF HEAT, 
Table (Continued). 
General state of the sky during the night previous to reading the instruments. 
Number 
of the 
Tables. 
1843. 
Month. 
Cloudy. 
Broken clouds. 
Half-cloudy. 
Principally clear. 
Cloudless. 
Day and 
hour of 
reading. 
Excess of 
the reading 
of the ther- 
mometer in 
air above 
that placed 
in the focus 
of the re- 
flector. 
Day and 
hour of 
reading. 
Excess of 
the reading 
of the ther- 
mometer in 
air above 
that placed 
in the focus 
of the re- 
flector. 
Day and 
hour of 
reading. 
Excess of 
the reading 
of the ther- 
mometer in 
air above 
that placed 
in the focus 
of the re- 
flector. 
- 
Day and 
hour of 
reading. 
Excess of 
the reading 
of the ther- 
mometer in 
air above 
that placed 
in the focus 
of the re- 
flector. 
Day and 
hour of 
reading. 
Excess of 
the reading 
of the ther- 
mometer in 
air above 
that placed 
in the focus 
of the re- 
flector. 
d h 
d h 
O 
d h 
O 
d h 
O 
d h 
O 
March 
10 21 
1 1*4 
30 21 
10-5 
21 21 
7-1 
12 21 
7-5 
1 21 
12-0 
11 21 
4-3 
22 21 
7-9 
16 21 
8-7 
2 21 
17-6 
13 21 
3-8 
26 21 
6-8 
20 21 
8-0 
3 21 
12-1 
14 21 
2-0 
23 21 
8-7 
4 21 
11-2 
1.5 21 
2-5 
24 21 
8-9 
5 21 
10-5 
27 21 
5-7 
6 21 
14-2 
31 21 
7-1 
7 21 
11-5 
> 
X 
8 21 
10-5 
9 21 
12-7 
i-3 
17 21 
11*2 
18 21 
10-0 
19 21 
6-0 
25 21 
9-2 
28 21 
12-3 
29 21 
12-6 
April 
1 21 
3-1 
2 21 
2-8 
3 21 
6-4 
8 21 
5-2 
4 21 
8-3 
6 21 
1-8 
5 21 
3-1 
10 21 
6-8 
9 21 
9-4 
14 21 
3 8 
7 21 
4-2 
16 21 
6-6 
11 21 
9-4 
13 21 
2-4 
12 21 
6-9 
19 21 
9'5 
13 21 
9‘2 
20 21 
5-3 
21 21 
9-0 
17 21 
10-3 
X 
25 21 
4*5 
29 21 
7-3 
18 21 
9-0 
X 
26 21 
5-8 
22 21 
13-0 
1-5 
28 21 
6-6 
23 21 
12-0 
24 21 
12*4 
27 21 
9-4 
30 21 
9-1 
Table LXXVIII. 
General state of the sky 
during the night previous to 
reading the instruments. 
1843. 
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 ex- 
posed to 
£ths of sky. 
On short 
grass. 
On garden 
mould. 
One inch 
high. 
Three 
inches 
high. 
In focus of 
metallic 
reflector. 
d h 
O 
O 
O 
O 
Cloudless. 
22 21 
37-0 
11-2 
4-0 
13-0 
23 21 
36-0 

6-8 
4-3 
12-0 
30 21 
48*6 
8*1 
7-6 
8-6 
86 
7-9 
9-1 
Principally cloudless. 
19 21 
42*3 
9-3 
0-3 
9-3 
24 21 
34-2 
12-7 
4-4 
12-4 
Half-cloudy. 
20 21 
42-3 
3-3 
0-3 
3-3 
21 21 
48-0 
9-0 
5-2 
9-0 
26 21 
38-2 
4-7 
6-2 
4-4 
4-7 
4-2 
6-7 
Principally cloudy. 
27 21 
37*4 
11-7 
9*7 
1-1 
8-4 
5-1 
9' 4 
Cloudy. 
28 21 
41-8 
4-0 
5*6 
2-3 
4-8 
3-0 
6*6 
29 21 
46-0 
7-3 
8-1 
6-2 
6-0 
7*3 
7-3 
