AT NIGHT, FROM THE EARTH, ETC 
Table (Continued). 
131 
Excess of the reading of the thermometer in air above that placed 
On yellow cotton 
wool on raisedboard. 
On blue cotton wool 
on grass. 
On blue cottonwool 
on raised board. 
On white wadding 
on grliss. 
On black wadding 
on grass. 
On flannel on grass. 
On flannel on raised 
board. 
On raw silk on 
grass. 
On raw silk on 
raised board. 
On silk from 
cocoon. 
On the raised 
board. 
On saw- dust on 
the raised board. 
On black-lead on 
raised board. 
On charcoal on 
raised board. 
On lamp-black on 
raised board. 
On whiting on 
raised board. 
On chalk on raised 
board. 
On tinfoil. 
On lead. 
On pantile. 1 
On slate. 
One-fourth of an 
inch above water. 
On paper on raised 
board. 
C 
rt 
Jg 
*2 
o 
F=i 
Amount O — IO. 
O 
To 
Direction . | 
7 
*kfj 
z 
X 
Haze, fog, mist or 
vapour. 
O 
0 
0 
0 
0 
o 
o 
o 
o 
0 
o 
o 
o 
o 
o 
4-3 
4-3 
6-6 
4-3 
... 
3-3 
30 
4-3 
3-6 
4-3 
Clear 
4-6 
... 
41 
40 
4-4 
4-8 
2-8 
5 6 
5*4 
3-4 
21 
5-2 
3-5 
4-1 
3-3 
41 
3-9 
41 
47 
2-1 
2 
5-3 
5-7 
50 
60 
33 
50 
37 
4-3 
2-3 
Clear 
S. 
2 
3-5 
5 5 
4-3 
67 
27 
4-3 
2-7 
3-5 
17 
s. 
2 
2-7 
2-7 
26 
3-3 
2-7 
Cirrostratus 
7 
2-7 
3-7 
4 7 
4-9 
2-7 
1-7 
27 
47 
3-2 
07 
17 
27 
2-5 
Cirrostratus 
10 
H. 
3-3 
33 
33 
4-7 
4-7 
3-3 
4-0 
4-5 
5-6 
05 
2-5 
.3-0 
2-5 
Cirrostratus 
10 
11 . 
... 
40 
2-7 
2-8 
Cirrostratus 
10 
H. 
... 
Clear 
... 
Clear 
H. v. 
Cirrostratus 
9 
li. 
... 
Thin clouds 
1 
3-8 
40 
Clear 
4-7 
4-2 
Clear 
... 
Thin clouds 
9 
... 
5-2 
... 
Thincirrost. 
10 
H. 
5-3 
5-6 
Clear 
40 
4-0 
Cirrostratus 
10 
Clear 
N. 
l 
Thin clmids 
5 
N. 
1 
Thin clouds 
4 
4 
Clear 
Clear . 
Haze 
... 
A thin veil 
10 
... 
A thin veil 
10 
0-3 
0-3 
4-3 
23 
5-3 
Nimbus ... 
8 
02 
8-7 
8-5 
9-3 
4-3 
73 
4-2 
6-7 
6-8 
7-3 
Clear . 
C. 
8-1 
7-8 
6-6 
5-6 
4-4 
5-4 
6-6 
6-3 
7-4 
Clear 
c. 
8-6 
8-6 
7-6 
7-2 
5 3 
51 
3 0 
6-4 
6-1 
76 
Clear . 
c. 
60 
6-7 
4*5 
4-5 
5-3 
3-2 
6-2 
65 
65 
Clear . 
c. 
Cumuli 
5 
60 
60 
... 
6-5 
6-4 
3-2 
3-2 
5-8 
4-8 
40 
5*5 
5-5 
G. 
3-3 
2-3 
1-7 
1-7 
0-8 
2-2 
2-7 
1-5 
2-2 
1-0 
1 8 
Clear 
C. 
5-3 
51 
5 3 
51 
2-8 
31 
40 
51 
3-8 
1-4 
5-9 
Clear 
C. 
5-5 
4*5 
4-5 
4-5 
2-6 
2-5 
3-6 
3-7 
4-5 
2-0 
4-7 
Clear 
c. 
8-0 
7-6 
5-8 
5-3 
3-8 
5-8 
4 6 
Clear 
N. 
1 
71 
8-1 
5-6 
7-1 
3-6 
5-3 
4-6 
6-6 
2 6 
Clear 
N. 
1 
5-3 
5-1 
5-4 
5-4 
... 
2-4 
4.4 
2-4 
2-2 
04 
Clear 
C. 
Clear 
...Van. 
Cirrostratus 
8 
... Vap. 
Cirrostratus 
5 
Nearly clear 
Vap. 
4-3 
4-3 
Clear 
c. 
5-2 
5-4 
Clear 
c. 
5-7 
4-3 
Clear 
c. 
5-5 
6-4 
Cirrostratus 
9 
c. 
4 9 
5-8 
Clear 
c. 
3-5 
53 
... 
Clear 
c. 
3-5 
4-5 
Clear 
c. 
... 
... 
2-5 
4-1 
... [ ... 
Clear 
... 
c. 
Clouds. 
Wind. 
( J h 30 m . At 21 h the whole of the thermometers were read again ; that in air had increased to 38°-2, and an increase from 10° to 20° had taken place in 
' of the other thermometers. 
l h - The thermometer in the reflector is covered with dew : there is hoar-frost on long grass : on raw wool there are many square pieces of ice oilc- 
an inch in thickness : at ll h 25 m one piece of ice was removed from raw wool, which was three-fourths of an inch in length, half an inch in breadth, 
eenth of an inch in thickness : on cotton wool the ice is forming in flakes, and there are some frozen dew drops on the grass. 
L4 h 50 m . All the thermometers which were on substances, with frozen particles about them, continued to read 32° till this minute, and now they all 
te increase of 7° must have been sudden. The circumstance of these readings continuing to read 32° for nearly three hours after the sky was cloudy, 
le effect of sensible heat becoming latent whilst the frozen particles were changing into a liquid state. At 17 h 20 m the clouds became broken and the 
dally clear, rain having fallen within the interval ; the reading of all the instruments decreased, but as the substances were all wet, it is probable that a part 
ase was owing to evaporation ; no use was therefore made of these observations. 
10 h 50 m . At this time a sudden deposition of moisture took place whilst I was looking at the instruments, and they all became wet with dew, except 
vas placed on sand. The readings of those instruments thus bedewed increased between 3° and 4° ; the temperature of the air continued to decline as 
lat the difference between the temperature of the air and those of the bedewed substances became less by the above amounts. 
