METEOROLOGICAL JOURNAL FOR MAY, 1831 
9 o’clock, A.M. 
3 o’clock, P.M. 
Dew 
External Thermometer. 
1831. 
Point at 
Rain, in 
Direction 
9 A.M. 
inches. 
of the 
Remarks. 
May. 
Barom. 
Attach. 
Therm. 
Barom. 
Attach. 
Therm. 
in de- 
grees of 
Fahrenheit. 
belt-registering. 
Read ofl 
at9A.M 
Wind at 
9 A.M. 
Fahr. 
9 A.M. 
3 P.M. 
Lowest. Highest 
O 1 
29.462 
58.7 
29.418 
60.3 
53 
57.3 
59.0 
46.7 
63.3 
0.019 
ssw 
Clear*— cloudy — showery. 
D 2 
29.557 
59.7 
29.583 
60.6 
51 
57.8 
56.5 
46.7 
60.2 
0.269 
E 
Cloudy and foggy — showery. 
$ 3 
29.638 
56.5 
29.652 
61.7 
54 
56.3 
62.2 
49.0 
63.4 
0.178 
SE 
r A.M. Cloudy — showers. P.M. Fine 
1 and clear — light brisk wind. 
5 4 
29.599 
61.3 
29.527 
61.9 
53 
60.0 
54.7 
49.4 
62.3 
0.017 
SSW 
A.M. Fine and clear. P.M. Overcast. 
n 5 
29.530 
55.6 
29.502 
56.7 
42 
51.6 
50.3 
43.7 
55.7 
WSW 
Fine — lightly cloudy. 
? 6 
29.783 
58.3 
29.813 
55.7 
48.5 
48.7 
40.3 
55.7 
0.153 
NW var. 
Cloudy.— Fine and clear A.M. 
h 7 
30.026 
50.4 
30.063 
54.3 
44.7 
50.3 
33.8 
54.5 
N 
Fine — light clouds. 
O 8 
30.264 
55.3 
30.276 
55.2 
38 
50.4 
51.3 
36.7 
52.3 
ENE 
Cloudy. — Fine A.M. 
D 9 
30.337 
55.3 
30.258 
55.3 
37 
51.2 
55.5 
38.3 
55.7 
NNE 
Fine and clear. — Cloudless P.M. 
$ 10 
30.215 
51.3 
30.162 
55.7 
47 
47.5 
54.4 
43.5 
54.6 
ESE 
Cloudy. — Light rain A.M. 
• 5 11 
30.201 
56.7 
30.197 
56.5 
45 
53.8 
57.5 
38.8 
58-5 
NE 
f Fine and clear— brisk wind. Cloudless 
t P.M. 
y 12 
30.125 
55.3 
30.038 
57.2 
47 
53.7 
60.0 
39.5 
61.7 
NNE 
Cloudless — hazy. 
? 13 
29.965 
61.4 
29.942 
61.9 
51 
57.7 
61.7 
45.5 
63.8 
NNE 
f A.M. Hazy. P.M. Fine and clear— 
t light clouds. 
h 14 
30.088 
56.8 
30.077 
58.7 
32 
50.0 
52.3 
41.7 
55.4 
NNE 
I ightly cloudy. 
©15 
30.058 
58.5 
30.010 
59.9 
35 
53.5 
62.6 
39.4 
63.7 
ENE 
f Fine. — A.M. Light haze. P.M. Clear — 
l light clouds. 
3 16 
30.132 
59.7 
30.141 
61.6 
43 
56.7 
65.7 
44.4 
67.3 
WSW 
Fine — lightly overcast. 
$ 17 
30.215 
63.4 
30.151 
63.7 
48 
63.3 
64.3 
48.3 
67.2 
ESE 
Clear and cloudless. 
5 18 
30.036 
66.5 
29.964 
65.6 
49 
63.7 
66.4 
50.5 
66.5 
ENE 
Clear and cloudless — light wind. 
y 19 
29.811 
67.7 
29.704 
65.3 
45 
61.7 
63.8 
52.3 
66.2 
E 
/ Light wind. A.M. Cloudless. P.M. 
1 Cloudy. 
? 20 
29.832 
68.2 
29.830 
66.9 
55 
65.7 
66.7 
56.3 
71.5 
S 
/ A.M. Fine and clear. A.M. Cloudy— 
l showery. 
h 21 
29.912 
61.9 
29.943 
68.0 
57 
57.4 
66.7 
53.6 
67.6 
0.086 
N 
r A.M. Overcast. P.M. Fine and clear 
\ — light clouds. 
©22 
30.001 
62.3 
29.991 
64.5 
53 
57.5 
61.7 
53.0 
66.6 
NNW 
Lightly overcast. 
5 23 
29.892 
62.3 
29.842 
67.7 
58 
58.7 
70.7 
52.3 
73.2 
NNW 
A.M. Overcast. P.M. Nearly cloudless. 
$ 24 
29.840 
64.3 
29.817 
69.7 
60 
60.5 
69.7 
55.7 
72.6 
N 
A.M. Overcast. P.M. Nearly cloudless- 
£ 25 
29.860 
65.9 
29.846 
70.8 
60 
64.7 
71.7 
54.6 
72.5 
N 
Fine and clear — light clouds and wind. 
O n 26 
29.849 
/ A.M. Overcast. P.M. Clear and 
57.7 
29.804 
66.8 
55 
57.6 
67.3 
51.5 
69.2 
E 
l cloudless. 
? 27 
29.792 
60.7 
29.790 
65.3 
52 
52.7 
63.7 
50.6 
64.8 
NNE 
Lightly cloudy — light wind. 
k 28 
29.929 
58.7 
29.971 
64.7 
47 
57.7 
63.6 
50.7 
65.3 
N 
Lightly cloudy. 
0 29 
29.975 
59.5 
29.932 
61.7 
54 
54.7 
55.5 
52.8 
55.6 
E 
Rain. 
D 30 
29.910 
59.7 
29.934 
63.7 
50 
55.3 
62.3 
49.7 
63.7 
0.333 
NNE 
A.M. Cloudy. P.M. Fine — light clouds. 
<? 31 
29.997 
63.7 
29.942 
63.4 
50 
61.3 
62.3 
51.3 
63.6 
E 
Fine and clear— light clouds. 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Sum 
29.930 
59.7 
29.907 
62.0 
49.0 
56.2 
62.2 
47.1 
63.0 
1.055 
Monthly Mean of the Barometer, corrected for Capillarity and reduced to 32° Fahr. 
'9 A.M. 
29.851 
3 P.M. 
29.821 
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. 
