METEOROLOGICAL JOURNAL FOR DECEMBER, 1830 
9 o’clock, 
A.M. 
3 o’clock, 
P.M. 
Dew 
External Thermometer. 
1830. 
Point at 
Rain, in 
Direction 
0 A.M. 
inches. 
of the 
Remarks. 
Barom. 
Attach. 
Therm. 
Barom. 
Attach. 
Therm. 
in de- 
Fahrenheit. 
Self-registering. 
Read off 
Wind at 
Decent. 
grees of 
at9A.M. 
9 A.M. 
Fahr. 
9 A.M. 
3 P.M. 
Lowest. 
Highest. 
S 1 
30.029 
45.3 
30.010 
45.2 
38 
42.6 
42.0 
41.0 
42.2 
ESE 
Overcast— light fog. 
y 2 
29.867 
44.0 
29.740 
43.5 
36 
39.8 
37.5 
38.3 
39.4 
ESE 
Overcast. 
¥ 3 
29.602 
41.8 
29.600 
42.4 
36 
37.8 
39.6 
35.5 
39.2 
0.047 
ESE 
Foggy. Light rain A.M. 
h 4 
29.752 
41.8 
29.776 
42.4 
33 
38.8 
40.0 
37.0 
39.6 
SE 
Lightly foggy. 
© 5 
29.756 
42.3 
29.590 
43.6 
32 
39.8 
42.3 
38.0 
43.4 
ESE 
Fine — light clouds. 
D 6 
29.118 
43.0 
29.080 
44.5 
36 
44.5 
46.3 
35.2 
46.5 
ESE 
Overcast— light rain. 
3 7 
29.150 
45.6 
29.166 
46.5 
41 
44.6 
45.8 
43.5 
46.6 
E 
Overcast. 
5 8 
29.201 
46.8 
29.176 
47.0 
41 
45.6 
45.0 
44.0 
45.0 
ESE 
Overcast. Light rain P.M. 
y 9 
28.897 
46.2 
28.869 
48.0 
39 
45.6 
47.8 
42.5 
47.2 
0.294 
ESE 
Overcast. Rain A.M. 
? io 
29.035 
47-4 
29.119 
47.9 
40 
43.0 
43.3 
41.8 
43.3 
0.186 
sw 
Light fog. 
h D 
29.314 
43.5 
29.307 
45.4 
33 
36.8 
41.8 
34.4 
42.0 
SW 
Fine— lightly cloudy. 
©12 
29.404 
41.0 
29.635 
42.7 
32 
33.5 
39.2 
31.0 
39.2 
sw 
Fine — lightly cloudy. 
D 13 
30.190 
37.2 
30.277 
38.8 
26 
31.0 
35.2 
28.8 
35.0 
s 
Fine — light haze. 
3 14 
30.398 
36.5 
30.386 
38.8 
24 
32.8 
40.0 
28.3 
40.2 
s 
Overcast and foggy. Light rain P.M. 
© ? 15 
30.471 
38.8 
30.382 
40.3 
31 
37.0 
39.5 
32.0 
39.8 
sw 
Foggy. 
V. 10 
30.361 
39.2 
30.368 
39.9 
32 
35.5 
35.2 
34.0 
36.2 
0.136 
E 
Fine — lightly cloudy. Light rain A.M. 
¥ 17 
30.025 
37.7 
29.960 
39.6 
29 
32.6 
38.2 
27.9 
38.0 
sw 
Fine — light clouds. Snow A.M. 
h 18 
30.162 
37.0 
30.176 
38.5 
28 
33.6 
36.0 
31.8 
36.0 
0.186 
N var. 
Fine — light clouds. 
©19 
30.186 
37.2 
29.971 
38.7 
29 
33.0 
37.5 
30.0 
42.2 
SW 
Overcast. 
D 20 
29.491 
39.8 
29.558 
41.4 
28 
39.0 
41.8 
30.2 
41.8 
S var. 
Fine — light clouds. 
3 21 
29.823 
38.7 
29.784 
40.0 
30 
35.6 
40.0 
33.8 
44.2 
SW 
Fine — hazy. 
5 22 
29.060 
41.8 
29.400 
43.8 
37 
44.9 
48.2 
34.8 
48.3 
SW 
Light rain. 
y 23 
29.427 
40.1 
29.459 
40.0 
31 
34.8 
33.6 
32.0 
34.2 
0.033 
SSW 
Hazy. Snow early A.M. 
¥ 24 
29.439 
32.7 
29.314 
32.4 
13 
20.4 
23.7 
18.6 
23.7 
NW 
Fine — lightly cloudy. 
k 25 
29.284 
28.6 
29.275 
29.7 
16 
18.4 
24.5 
15.8 
24.5 
wsw 
Lightly overcast and hazy. 
©26 
29.292 
25.8 
29.260 
29.7 
19 
22.6 
30.0 
16.8 
30.0 
w 
Lightly cloudy and hazy. 
D 27 
29.167 
29.7 
29.165 
31.7 
28 
28.5 
31.3 
21.7 
32.2 
E 
Light clouds and haze. 
3 28 
29.041 
32.4 
29.134 
33.3 
31 
33.0 
34.2 
27.3 
34.2 
E 
A.M. Snow. P.M. Light r i„. 
O 9 29 
29.656 
32.6 
29.657 
34.8 
30 
31.0 
36.3 
28.6 
36.3 
WSW 
Fair— light clouds. 
21 30 
29.453 
35.6 
29.282 
37.0 
33 
36.7 
38.2 
29.4 
45.2 
ESE 
Overcast and foggy. Light rain P.M. 
$ 31 
29.185 
40.4 
29.374 
41.8 
42 
45.5 
44.2 
35.7 
45.4 
S var. 
( Lightly overcast and cloudy— brisk un- 
l steady wind. 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Sum 
29.588 
39.0 
29.589 
40.3 
31 
36.0 
38.7 
32.2 
39.4 
0.882 
Monthly Mean of the Barometer, corrected for Capillarity and reduced to 32° Fahr. 
;9 A.M. 
29.574 
3 P.M. ) 
29.572 5 
OBSERVANDA. 
Height of the Cistern of the Barometer above a Fixed Mark on Waterloo Bridge =83 feet 2$ in. 
above the mean level of the Sea (presumed about) =95 feet. 
The External Thermometer is 2 feet higher than the Barometer Cistern. 
Height of the Receiver of the Rain Gauge above the Court of Somerset House =79 feet 0 in. 
The hours of observation are of Mean Time, the day beginning at Midnight. 
The Thermometers are graduated by Fahrenheit’s Scale. 
The Barometer is divided into inches and decimals. 
