130 
MR. GLAISHER ON THE RADIATION OF HEAT, 
Table (Continued). 
Excess of the reading of the thermometer in air above that placed 
N umber of the Tablei 
1843. 
Astronomical day, 
hour and minute. 
Reading of Therm, a 
the height of 4 feet 
above the soil, protect 
from radiation. 
On long grass. 
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 unwrought white 
cotton wool on 
grass. 
On unwrought white 
cotton wool on 
vjiispfl 1‘innvH . 
h 
m 
o 
n 
0 
0 
0 
0 
0 
0 
Oct. 25. 
21 
0 
341 
51 
41 
6-1 
61 
41 
2-1 
-7-9 
-5-4 
61 
41 
21 
31 
1-9 
1-9 
61 
2-6 
IS 
26. 
17 30 
331 
5-8 
26 
5-4 
5-4 
4-5 
1-2 
-77 
-5-0 
24 
32 
2-0 
23 
11 
00 
5-6 
0> 
Nov. 3. 
5 
30 
493 
5-3 
5-3 
75 
81 
6-3 
20 
1*5 
2-5 
3-7 
1-4 
0-7 
7-1 
c 
7. 
10 
0 
42-5 
5 0 
5-3 
85 
6-5 
57 
22 
-4-5 
00 
30 
27 
30 
4-5 
03 
-0-2 
70 
C 
7. 
11 
10 
43-5 
5*5 
6 3 
9 5 
6 5 
65 
21 
-17 
2-5 
3-5 
2-5 
2-5 
4 5 
0-5 
-03 
8-5 
o 
10. 
17 30 
347 
5-7 
5-5 
6-6 
5-5 
77 
3-3 
-4-3 
17 
3-7 
17 
2-5 
1 5 
00 
61 
12. 
13 
5 
330 
5-7 
57 
77 
67 
4-2 
37 
-3-9 
-0-3 
0-7 
0-5 
5*7 
p 
13. 
10 
10 
34-5 
5'5 
4-5 
4-0 
3-5 
4-5 
2-5 
-2-5 
2-5 
13 
13 
4-0 
15. 
4 
15 
380 
5-9 
5 0 
6 5 
57 
7-0 
2-5 
-27 
0-7 
32 
0-8 
57 
Sept. 16. 
11 
20 
58-7 
6-0 
37 
47 
4-2 
27 
3-4 
3 5 
3-5 
1-2 
17. 
12 
30 
61-9 
69 
3-5 
50 
4-1 
2-2 
3-6 
4-2 
3-8 
2-5 
17. 
13 
20 
60-4 
6-5 
4 3 
4-2 
4-2 
21 
3-4 
33 
3-4 
23 
17. 
15 
20 
59-4 
6-9 
4-4 
37 
3-8 
2-7 
2-8 
2-7 
3-6 
2-4 
20. 
13 
0 
52-8 
61 
4-4 
4-8 
40 
3-6 
2-8 
72 
20. 
13 
50 
51-4 
6-7 
4-6 
5-2 
41 
30 
8-4 
Oct. 2. 
5 
0 
610 
60 
50 
50 
4-5 
3-5 
2. 
11 
15 
53-3 
6-3 
5-8 
60 
3-6 
33 
5-5 
31 
3-9 
5. 
9 
0 
539 
63 
6 9 
54 
23 
27 
47 
2-9 
5. 
10 
40 
540 
6-0 
4-2 
4-5 
23 
32 
3-8 
2-6 
12. 
14 
0 
35-5 
6-5 
60 
11-5 
75 
5-5 
3-3 
4*5 
2-5 
8-6 
12. 
18 
0 
38-0 
60 
60 
5 0 
25 
3-2 
3-2 
30 
5-8 
20 
12. 
18 
15 
38-5 
6-5 
6-5 
90 
9 '5 
5-5 
25 
4-5 
3-7 
97 
13. 
8 
0 
41-2 
6-7 
62 
112 
9-2 
6-2 
3-2 
4-2 
2-2 
92 
16. 
9 
20 
33-7 
6*5 
4-5 
87 
101 
70 
2-2 
2-7 
1-9 
8-1 
16. 
11 
0 
32-8 
6-8 
5-8 
9-3 
9-3 
73 
30 
43 
23 
7-8 
16. 
12 
10 
34-4 
6-4 
5-4 
6-4 
6-4 
67 
2-4 
3-4 
1-6 
64 
16. 
14 
0 
380 
6-0 
30 
60 
60 
20 
0-5 
2-0 
1-0 
60 
17. 
7 
0 
39-3 
6-8 
4*5 
9-8 
9-3 
5-3 
28 
2-8 
2-3 
23 
3-8 
23 
i -3 
93 
18. 
17 
0 
28-5 
6-5 
6-3 
10-5 
8-5 
97 
47 
3-9 
0-8 
3 0 
61 
3-5 
03 
10-5 
19. 
15 
30 
29-6 
6-5 
4-6 
10-8 
10-6 
71 
6 ’6 
4-8 
3-6 
4.4 
4-6 
0-6 
0-6 
10-6 
19. 
17 
30 
29-6 
6 6 
6-1 
90 
10-6 
47 
3-9 
1-8 
36 
5-8 
5 6 
2-0 
1-8 
9-0 
19. 
19 
30 
32-5 
6 3 
57 
57 
5-9 
5-0 
3-3 
3-3 
1-5 
3-5 
5-5 
2-7 
1-5 
63 
21. 
4 
25 
49-5 
6*5 
4-3 
70 
6 5 
5-5 
1*5 
-6-5 
60 
1-3 
2-5 
27 
4-0 
2-5 
20 
60 
21. 
11 
30 
39-0 
67 
4-5 
90 
8-0 
5-3 
2-6 
-40 
-1-3 
3-0 
20 
2*4 
2-8 
0-6 
0-2 
65 
23. 
5 
0 
50-3 
65 
41 
80 
6-5 
4-9 
1-4 
-0-5 
0-5 
23 
1-0 
26 
30 
01 
-03 
7-1 
26. 
5 
10 
43-5 
67 
2-8 
5 0 
5 0 
31 
20 
-4-3 
-2-4 
17 
03 
13 
17 
-0-7 
-0-9 
5-0 
26. 
15 
30 
33-1 
63 
35 
6-4 
67 
4-1 
2-6 
-77 
-50 
2-6 
43 
17 
3-8 
1-1 
00 
63 
26. 
19 
0 
333 
6-3 
4-3 
67 
71 
30 
2-5 
-67 
-8-0 
2-3 
4-3 
3*5 
4-7 
13 
13 
53 
Nov. 8. 
9 
10 
37-8 
67 
67 
7-8 
8-0 
7-8 
4-3 
-3-4 
4-8 
41 
3-8 
41 
5-8 
2-6 
1-8 
8-6 
8. 
11 
0 
36-6 
6-6 
6-6 
8-6 
8-6 
71 
3-6 
-4-5 
4-6 
4-6 
3 6 
4-6 
6-6 
1-8 
1-6 
8-6 
8. 
12 
40 
41-4 
6-4 
5-9 
7-9 
5-9 
5-9 
1-4 
-1-6 
1-4 
16 
0-9 
1-9 
02 
0-2 
7-4 
Sept. 1 6. 
9 
10 
61-5 
7-6 
8-3 
5-5 
60 
07 
3-6 
4-5 
7-5 
37 
17. 
11 
0 
62-3 
70 
6-0 
5-3 
3-8 
1-5 
3-3 
3-8 
43 
2-7 
17. 
11 
30 
62-4 
76 
6-6 
5-6 
4-5 
2-0 
4-2 
43 
4-6 
2-7 
18. 
7 30 
60-1 
7-8 
63 
6 6 
5-1 
1-8 
40 
3-8 
5-5 
3-4 
20. 
10 50 
54-5 
7-5 
5-5 
4-5 
3-5 
70 
30 
7-5 
20. 
11 
20 
54-2 
77 
60 
6-2 
... 
4-2 
4-2 
3-0 
87 
20. 
14 
30 
51 7 
7-3 
5 0 
47 
. . . 
3-4 
43 
2-9 
87 
24. 
17 35 
47-5 
71 
77 
8 4 
2-5 
2-8 
5 0 
3-2 
7-5 
27. 
18 
. 0 
40-4 
7-9 
6-6 
6 0 
4.4 
5 4 
5-9 
4-4 
9-9 
27. 
18 
22 
39-7 
7-5 
7' 4 
7-9 
3-2 
4-9 
4-7 
37 
8-2 
27. 
19 
10 
4 10 
70 
6 2 
6-5 
4*5 
5 0 
3-5 
90 
Oct. 5. 
5 
20 
60-3 
73 
61 
5-8 
0-8 
-6-2 
3-7 
2-9 
Oct. 25, 21 h O'"; the ice in evaporator is 05 in thickness three hours after sun-rise. Nov. 3, 5 h 30 m ; scud and vapour. Nov. 7, ll h 10 m ; dew 
Sept. 16, ll h 20 m ; a great deposition of moisture. Sept. 1 7, 12 h 30 m ; the stars nearly obscured. Sept. 17, 13 h 20 m ; a few stars visible in the zen 
20, 13 h O m ; dew. Sept. 20, 13 h 50 m ; dew. Oct. 2, 5 h 0 m ; zenith clear. Oct. 12, 18 b 15“‘; zenith clear. Oct. 17, 7 h 0 m ; shortly after rain 
Nov. 8, 9 h 10 m ; no dew. Sept. 16, 9 h 10 m ; the stars look small. Sept. 17, ll h 0 m ; zenith clear. Sept. 20, ll h 20 m ; dew. Sept. 20, 14 b 30"'; d 
27, 18 b 0 ra ; hoar-frost. Sept. 27, 18 b 22 m ; hoar-frost; the sun up. Sept. 27, 19 h 10 m ; hoar-frost disappearing. 
Oct. 25, 20 b 0™. On'examining the several substances at this time, it was found that cotton wool was covered with spikes of ice one-sixteenth of an in-; 
ness : on raw wool there were a few flakes of clear ice, and a few spikes ; also each fibre was encrusted with small round particles of ice : on blue 
wool the spikes were abundant, and all were inclined to the horizon at an angle of 30°; on every fibre of raw silk there were two spikes emanating hoi 
point and at right angles to the fibre, and inclined to the horizon at an angle of 30° : on black-lead, which substance was white with hoar-frost very i 
were clusters of spikes one-tenth of an inch in length, and inclined to the horizon at all angles : on charcoal there were clusters of spikes : on whiting 
spikes at all angles : on flannel the spikes were one-eighth of an inch in length : on saw-dust the spikes were in hunches, many of which were of a fan- 
and on wood there were many spikes. 
Oct 13, 20 h 40 ro . After this observation, the three substances, raw wool, cotton wool and flax, were frequently examined, for the purpose of ascer 
time that each substance became free from dew ; the sun was shining on all of them ; it was noticed at 22 h 30 m that flax was free ; at 14 d l b 30™ cotto 
just free, but on raw wool small drops of water continued throughout the day. 
