METEOROLOGICAL JOURNAL FOR APRIL, 1830 
9 o’clock 
A.M. 
3 o'clock, P.M. 
Dew 
External Thermometer. 
1830. 
Point at 
Rain, ii 
Barom. 
Attach. 
Barom. 
Attach. 
9 A.M. 
in de- 
Fahrenheit. 
Self-registering. 
inches. 
Read off 
of the 
Wind at 
9 A.M. 
Remarks. 
April. 
Therm. 
Therm. 
grees of 
at9A.M 
Falir. 
9 A.M. 
S P.M. 
Lowest. 
Highest 
V 1 
29.694 
46.4 
29.708 
48.8 
37 
37.5 
42.0 
34.9 
42.0 
0.389 
N 
f Overcast — rain and snow with brisk 
29.542 
45.7 
38 
1 wind A.M. 
? 2 
29.372 
45.6 
38.7 
39.8 
36.2 
39.8 
0.250 
E 
Rain— brisk wind. 
h 3 
29.218 
44.3 
29.519 
45.8 
39 
39.3 
40.0 
36.3 
40.0 
0.583 
N 
A.M. Rain. P.M. Overcast — brisk wind. 
O 4 
30.112 
42.3 
30.152 
45.7 
29 
35.3 
41.8 
30.7 
42.3 
0.014 
NNW 
Fine — lightly cloudy. 
J 5 
30.188 
40.7 
30.085 
45.0 
29 
34.6 
46.2 
29.7 
46.2 
N 
A.M. Overcast. P.M. Fine. 
<J 6 
29.778 
43.4 
29.751 
47.5 
31 
41.3 
56.0 
31.4 
57.3 
W 
Fine and cloudless— light haze. 
5 7 
29.878 
48.3 
29.828 
51.8 
42 
48.4 
54.2 
40.3 
54.7 
ssw 
Overcast — light wind. 
on s 
29.620 
51.3 
29.552 
55.0 
45 
53.3 
62.2 
45.3 
64.3 
ESE 
Fine — light clouds. 
? 9 
29.433 
57.2 
29.428 
60.6 
50 
57.4 
62.3 
48.4 
62.7 
SSW 
Fine and clear — light clouds and wind. 
h 10 
29.479 
51.7 
29’555 
57.8 
48 
49.6 
54.6 
45.3 
58.7 
0.283 
w 
A.M. Cloudy. P.M. Fine — showers. 
oil 
29.619 
55.9 
29.613 
58.3 
44 
52.7 
56.6 
45.6 
56.6 
0.008 
SSW 
Fine and clear — cloudy — light showers. 
D 12 
29.451 
54.7 
29.492 
57.2 
52 
53.8 
54.8 
46.8 
57.4 
0.167 
NNW 
Cloudy— showers . 
<? 13 
29.773 
56.3 
29.856 
57.5 
46 
53.7 
57.0 
43.3 
57.7 
w 
Fine and clear — light brisk wind. 
5 14 
30.040 
53.5 
29.977 
58.7 
44 
52.4 
60.2 
43.2 
61.6 
w 
Fine — lightly cloudy. 
n 15 
29.792 
55.3 
29.708 
58.2 
50 
53.4 
58.5 
49.4 
59.2 
s 
Overcast. 
? 16 
29.674 
58.4 
29.698 
61.0 
56 
58.5 
61.4 
51.3 
63.3 
0.042 
wsw 
Lightly cloudy — light rain P.M. 
h U 
29.686 
59.2 
29.653 
61.2 
52 
56.6 
58.6 
52.3 
61.6 
0.008 
ssw 
Lowering— light brisk wind. 
©18 
29.860 
60.3 
29.837 
60.6 
45 
54.0 
60.4 
44.6 
61.6 
0.075 
w 
Fine and clear — light clouds, 
r Overcast — brisk wind. At 4 P.M. 
D 19 
29.635 
53.7 
29.637 
59.3 
43 
52.9 
55.6 
47.3 
59.7 
NNW 
4 thunder and lightning with heavy 
C rain and hail. 
<? 20 
29.732 
53.8 
29.766 
57.4 
50 
50.7 
55.2 
43.2 
58.4 
0.133 
w 
Overcast — rain A.M. 
5 21 
29.898 
53.6 
29.779 
57.8 
51 
51.2 
55.2 
43.7 
58.6 
0.022 
wsw 
Overcast— light rain. 
9V2 2 
? 23 
29.567 
55.7 
52 
54.0 
50.7 
56.7 
57.3 
wsw 
Overcast. 
29.305 
58.5 
29.257 
60.5 
55 
55.7 
55.5 
52.3 
ssw 
Light rain — strong high wind at night. 
h 24 
52 
0.022 
f A.M. Rain. P.M. Fine and clear. 
29.242 
56.9 
29.470 
59.2 
52.3 
55.3 
49.3 
57.7 
wsw 
\ Brisk wind. 
025 
30.017 
55.3 
30.098 
59.3 
40 
51.7 
58.7 
40.8 
62.5 
0.025 
w 
Fine and clear — cloudy. 
J 26 
30.221 
58.6 
30.210 
60.6 
50 
56.6 
61.8 
47.2 
64.4 
ssw 
Fine and clear — light clouds. 
<J 27 
30.247 
58.6 
30.196 
61.1 
42 
57.9 
62.8 
44.6 
63.6 
SSE 
Very clear and cloudless — light wind. 
9 28 
30.139 
59.7 
30.078 
61.6 
50 
59.4 
64.4 
46.6 
67.3 
ESE 
Very clear and cloudless — brisk wind. 
U 29 
30.028 
63.7 
29.921 
66.2 
50 
62.7 
69.5 
51.3 
70.7 
ESE 
Very clear and cloudless — light wind. 
? 30 
29.885 
65.3 
29.849 
68.9 
54 
64.6 
70.0 
52.3 
72.0 
E 
Very clear and cloudless — light wind. 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Sum 
29.758 
53.8 
29.760 
56.8 
45.5 
51.3 
56.2 
44.1 
57.9 
2.021 
Monthly Mean of the Barometer, corrected for Capillarity and reduced to 32° Fahr 
9 A.M. 
20.707 
3 P. M. 
29.701 
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. 
Tlie 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 arc graduated by Fahrenheit’s Scale. 
The Barometer is divided into inches and decimals. 
