132 
MR. GLAISHER ON THE RADIATION OF HEAT 
Table (Continued). 
Excess of the reading of the thermometer in air above that placed 
Number of the Tabic 
1813. 
Astronomical (lay, 
hour and minute. 
Reading of Therm, a 
the height of 4 feet 
above the soil, protect 
from radiation. 
rt 
& 
bo 
CJ 
o 
On short grass. 
On raw wool 
on grass. 
On flax on grass. 
In focus of reflector. 
Nine inches above 
wood. 
One inch below 
surface of ground 
under short grass. 
On surface of 
ground under 
short grass. 
On surface of 
ground under 
long grass. 
On garden mould. 
On gravel. 
On river sand. 
On river sand on the 
raised board. 
One inch high above 
grass. 
Two inches high 
above grass. 
Three inches high 
above grass. 
Six inches high 
above grass. 
Twelve inches high 
above grass 
On un wrought white 
cotton wool on 
grass. 
On unu rough t white | 
cotton wool on i 
raised board. 
h 
m 
O 
o 
o 
0 
o 
0 
o 
o 
o 
Oct. 5. 
7 
20 
55-4 
7-4 
6-6 
5-2 
0-9 
1-4 
4-6 
3-2 
9. 
10 
20 
44-5 
7-7 
5-3 
5 2 
51 
1-7 
2-0 
5-0 
40 
9. 
11 
10 
440 
7-7 
60 
5-4 
3-5 
6 0 
2-6 
6-0 
43 
12. 
11 
O 
37T 
71 
3-6 
51 
2-8 
31 
23 
2-6 
3-6 
21 
12. 
11 
23 
36-8 
70 
4-8 
7-8 
8-8 
5 3 
2-8 
3-8 
23 
8-8 
12. 
12 
0 
36-5 
7-0 
4-7 
90 
8-5 
5 5 
3-5 
4-2 
23 
90 
13. 
5 
15 
43-5 
7-5 
55 
5-5 
1*5 
3-5 
]*5 
i-5 
40 
15 
”5 
13. 
18 
55 
37-6 
7-9 
7-0 
7-8 
9-9 
8 2 
3-6 
5-3 
4-1 
106 
£ 
14. 
9 
30 
36-8 
74 
6-3 
7-8 
9-3 
8-2 
2-8 
5 0 
31 
8-1 
16. 
7 
20 
35 0 
7-8 
5-7 
8-2 
120 
7-2 
2-6 
4-0 
1-8 
8-8 
5 
16. 
11 
25 
33-8 
7-8 
5-8 
10 3 
10 5 
7-8 
2 8 
3-8 
20 
90 
16. 
12 
0 
34-0 
70 
60 
9-0 
100 
7-5 
2-0 
3-5 
1-2 
8-0 
X 
20. 
9 
20 
42 1 
7-1 
4-1 
7-3 
9 1 
51 
1-4 
- 1-9 
-6-i 
3-1 
2-3 
2-4 
29 
31 
91 
20. 
11 
0 
420 
7-0 
4-5 
10-8 
100 
70 
2-0 
- 10 
00 
30 
3-0 
30 
3*3 
30 
i-o 
0-2 
6-8 
25. 
19 
30 
31-0 
70 
5 0 
9-0 
87 
5 0 
30 
-10-3 
-6-3 
4-2 
1-4 
-02 
0-6 
4-2 
1-4 
13 
7-5 
62 
26. 
11 
30 
35-6 
7-2 
4-9 
5-8 
8-4 
5-6 
3-1 
- 6-4 
-4-4 
5-3 
1-4 
5-8 
2-8 
5-3 
1-4 
0-9 
6-2 
Nov. 7. 
7 
30 
46-2 
7-6 
7-4 
14-2 
11-9 
9-0 
45 
- 1-6 
5-2 
7-2 
3-4 
3*6 
7-2 
30 
1-2 
12-2 
11. 
9 
50 
37-5 
7-0 
7-0 
10-3 
9-5 
9-7 
2-2 
- 0-5 
3-5 
4-5 
3-5 
3-7 
3-1 
1-7 
7-7 
11. 
12 
0 
35-5 
7-5 
6-5 
10-9 
9-5 
7-8 
3-5 
- 1-9 
1-5 
3-5 
2-5 
4-2 
1-4 
0-5 
7-5 
Sept. 13. 
15 
20 
49-5 
87 
8-5 
110 
1-5 
7-0 
5-0 
8-5 
4-5 
9-5 
83 
15. 
9 
10 
61-5 
8-5 
7-0 
60 
5-0 
1-9 
3-5 
5-3 
5-5 
2-5 
8-5 
18. 
8 
0 
65-3 
8-0 
5-9 
6-2 
3-5 
5-3 
3-8 
6-1 
31 
18. 
11 
20 
60-3 
80 
6-1 
8-6 
0-1 
7-6 
4-1 
9-4 
20. 
8 
45 
57-6 
8-6 
8-6 
8-8 
5-8 
2-8 
7-8 
4-3 
108 
20. 
9 
55 
57-3 
8-5 
8-8 
61 
4-3 
1-3 
4-1 
3-9 
5 3 
33 
20. 
11 
40 
54-2 
8-4 
7-5 
6-2 
2-0 
4-2 
30 
8-7 
20. 
15 
20 
52 0 
8-5 
7-6 
60 
2-7 
6-4 
40 
9-2 
21. 
18 
45 
51-8 
83 
7-4 
5-8 
... 
4-0 
6-0 
31 
8-1 
23. 
5 
40 
62 6 
8-1 
6-6 
6-2 
1-6 
2-6 
4-4 
3-4 
9-4 
23. 
7 
30 
58-3 
8-3 
6-8 
7-3 
2-3 
i-i 
8-1 
3-7 
9-5 
23. 
ii 
35 
52T 
8-2 
7-1 
5-6 
2 1 
6-6 
71 
3-9 
7-2 
24. 
13 
30 
525 
8-5 
7-1 
6-8 
3-5 
5-5 
50 
3-8 
8-0 
27. 
11 
30 
41-2 
8-7 
7-4 
8-2 
4-2 
7-2 
6-2 
4-0 
11-4 
27. 
15 
15 
39-8 
88 
73 
7-3 
3-8 
60 
5-0 
3-8 
103 
27. 
17 
15 
39-5 
8-0 
8-0 
75 
3-9 
50 
5*5 
4-5 
10-0 
27. 
18 
48 
40-4 
8-4 
8-4 
8-6 
4-9 
5-4 
3-4 
109 
Oct. 2. 
7 
30 
57-4 
8-4 
8-9 
8-5 
4-8 
5-4 
7*4 
4-6 
9-4 
4. 
7 
30 
58-0 
8-0 
7-0 
50 
3-2 
30 
5-5 
3-7 
8-8 
9. 
9 
20 
45 ‘5 
8-1 
5-5 
6-3 
2-9 
0-3 
1-5 
6 3 
4 0 
9. 
15 
10 
40- 1 
8-6 
8-6 
6-6 
4 1 
2-6 
21 
8-1 
3-9 
12. 
13 
10 
36-2 
8-0 
6-2 
12-2 
9-2 
67 
4-0 
4-8 
32 
9-7 
13. 
18 
0 
38-4 
8-8 
6-9 
7-1 
6-9 
8-0 
3-3 
5-4 
3-9 
9-6 
13. 
18 
20 
381 
8 - 4 
6-5 
6-8 
6-5 
7-7 
3-6 
5-3 
4-1 
9-1 
13. 
18 
40 
37-6 
8-1 
7-1 
8-8 
11 0 
8 6 
3*6 
5-9 
4-2 
11-6 
13. 
19 
20 
37-2 
8-7 
70 
10-2 
9-2 
8-4 
3-1 
5-5 
4-2 
9-7 
14. 
5 
25 
44-6 
8-9 
7-4 
120 
11-6 
8-2 
3-6 
5-4 
39 
11-6 
14. 
7 
10 
39-5 
8-8 
7-3 
10-8 
10-7 
8-7 
3-5 
5-6 
3-5 
100 
15. 
17 
20 
30-5 
8-7 
8-7 
110 
10-7 
5-3 
9-3 
53 
11-7 
20. 
5 
20 
45-6 
8-9 
4-6 
10-2 
91 
11-0 
- 1-6 
6-8 
20 
i-4 
3-0 
31 
0-6 
-02 
7-4 
21. 
5 
0 
48 2 
8-2 
5*5 
9-2 
8-9 
5-2 
2-1 
- 1-0 
00 
2-2 
2-2 
3-2 
4-5 
2-5 
2-1 
8-7 
25. 
15 
0 
32-9 
8-1 
7-5 
110 
11-5 
7-9 
4-4 
- 9-6 
-3-4 
2-8 
-0-1 
2-4 
2-2 
13 
8-9 
25. 
18 
15 
30-3 
8-0 
6-7 
10-6 
111 
6-8 
3-9 
— 110 
-6-7 
2-5 
03 
1-3 
1-9 
1-4 
9-0 
8-8 
26. 
9 
0 
38-3 
8-3 
71 
10-0 
9-8 
7-3 
3-0 
- 4-7 
-1-7 
2-7 
2-3 
2-7 
13 
0-8 
83 
Nov. 1. 
8 
30 
380 
80 
6-0 
105 
10-5 
6 0 
3-0 
- 60 
-40 
2-5 
-10 
2-0 
2-0 
15 
10-0 
11. 
5 
30 
40-5 
8-3 
5-4 
8-5 
8-3 
60 
25 
- 23 
-2-5 
1-7 
1-3 
2-4 
53 
13 
8-8 
12. 
20 
30 
30-6 
8-6 
7-6 
101 
9-8 
6-1 
3-9 
- 4 2 
06 
2-6 
23 
9-6 
13. 
9 
0 
330 
8-1 
6-0 
9-2 
8-6 
8-4 
3-5 
- 4-0 
20 
1-9 
1-7 
7-0 
Oct. 14, 9 h 30 ra ; the stars very dim. Sept. 15, 9 1 ' 10 m ; horizon thick. Sept. 21, 18 h 45 m ; great deposition of moisture. Sept. 24, 13 h 30"' ; the st 
to he dim and small. Sept. 27, 15 h 15 m ; hoar-frost. Sept. 27, 17 h 15 m ; hoar-frost. Sept. 27, 18 h 48 m ; hoar-frost. 
Oct. 12, ll h 0 m . The thermometer placed on long grass was thickly encrusted with hoar frost. At the time of the deposition of dew the readings 
thermometers increased which became wetted by it ; that is, of every instrument whose reading was less than the temperature of the dew-point. The lii 
ance of dew was in very minute drops on the pointed ends of long grass, which on receiving an increase of water flowed down the blades. 
Oct. 21, 5 h 0 m . At this time 10 grains of wool were placed on grass, and a similar parcel was placed on the raised board ; at 7 h 30 m the former wa 
weigh 12-1 grains, and the latter 10*7 grains ; the glass stems of all the thermometers were wet with dew, though the substances upon which they were p. 
not yet wet; at 19 h the weight of the parcel which was placed on grass was 17 grains, that placed on the raised board had blown away. 
Nov. 12, 20 h 0" 1 . Wood was covered with spikes of ice one-fourth of an inch in thickness, inclined to the horizon at an angle of 60°, and at all azir 
