1826. 
May. 
9 o’clock, A. M. 
3 o’clock, P. M, 
Dew 
Point at 
9 A. M. 
in de¬ 
grees of 
Fahr. 
External Thermometer. 
Rain, in 
inches. 
Read off 
at 0 A.M. 
Direction 
of the 
Wind at 
9 A.M. 
Remarks.. 
Barom. 
Attached 
Thermo¬ 
meter. 
Barom. 
Attached 
Thermo¬ 
meter. 
Fahrenheit. 
Self-registering. 
9 A.M. 
3 P. M. 
Lowest. 
Highest. 
]) 
I 
30.309 
51-5 
30.220 
52.0 
38 
46.0 
51-5 
39-0 
53-0 
NNE 
Fine—cloudy. 
S 
2 
30.144 
49.0 
30.010 
52-3 
39 
48.0 
57-5 
36.5 
59.2 
N 
Fine—light clouds. 
9 
3 
30.025 
51-5 
30.045 
52.0 
44 
48.0 
48.0 
43-0 
49-5 
NNE 
Overcast and hazy. 
n 
4 
30.047 
50.0 
30.010 
50.5 
34 
44*5 
46.5 
39-5 
47-5 
NE 
Fine—cloudy. 
¥ 
5 
30.010 
49.0 
30.095 
53-0 
43 
45.0 
50.0 
40.0 
52.2 
NE 
Cloudy. 
h 
6 
30.041 
50.0 
30.020 
51.0 
35 
45.0 
48.0 
39-5 
49.8 
NNW 
Cloudy—showery. 
• 0 
7 
30.018 
52.0 
30.004 
52.0 
40 
49.0 
51.0 
39-0 
55.0 
NNE 
Cloudy. 
D 
8 
30.027 
55.0 
30.004 
56.0 
43 
54.0 
57.0 
41.5 
64.0 
NE 
Fine—strong wind. 
S 
9 
30,095 
54-5 
30.008 
56.0 
36 
51*5 
60.5 
39-0 
62.0 
NNE 
Fine—thin scattered clouds. 
5 
10 
30.095 
56.5 
30.012 
S 7-7 
44 
55*5 
61.0 
44-5 
63-5 
NNW 
Fine—cloudy. 
% 
11 
30.117 
54 -S 
30.126 
58.0 
44 
50.5 
58.0 
49.0 
61.5 
ESE 
Foggy and overcast. 
¥ 
12 
30,223 
54-7 
30.229 
56.7 
39 
51.0 
52.0 
42.5 
54*5 
ESE 
Cloudy and overcast. 
h 
*3 
30,297 
55.0 
30.202 
56.0 
34 
50.0 
54.0 
43-5 
57-5 
SE 
Fine. 
0 
*4 
30.111 
58.0 
30.051 
57.0 
4 > 
53-0 
57-5 
39-0 
59-5 
E 
Fine—overcast. 
3 ) 
15 
30.146 
58.8 
30.136 
58.3 
39 
54.0 
57.0 
40.5 
59.0 
N 
Fine—overcast. 
S 
16 
30.146 
57.0 
30.113 
58.0 
45 
52.0 
62.0 
42.5 
65.2 
E 
Overcast and cloudy. 
5 
^7 
30.115 
63.0 
30.142 
62.5 
45 
51.0 
66.5 
50.5 
VO 
W 
Fine—light clouds. 
n 
18 
30.105 
65.0 
30.105 
63.0 
52 
66.0 
63-5 
55.8 
70.5 
SSW 
A. M. fine. P. M. raini 
¥ 
19 
29.911 
67.0 
29.831 
65.0 
51 
63.0 
68.5 
50.2 
70.0 
S 
Fine—nearly cloudless. 
1? 
20 
29.730 
61.5 
29.833 
63.5 
50 
56.5 
63.0 
53-5 
63-4 
E 
A.M.overcast. P.M.fine—nearly cloudless 
00 
21 
30.025 
59.0 
30.029 
62.0 
46 
54.0 
65.0 
45.8 
67.5 
SE 
A.M.cloudy. P.M.fine—nearly cloudless. 
D 
22 
30.105 
67.5 
30,027 
66.0 
48 
64.0 
71.0 
49-5 
72.5 
N 
Nearly cloudless. 
$ 
23 
30.004 
69.0 
29.944 
66.0 
49 
64.0 
61.5 
4S • 6 
72.5 
NNW 
Cloudy, 
9 
24 
29.818 
61.0 
29,820 
64.0 
50 
56.5 
57-5 
52.0 
67.0 
N 
Rain—overcast. 
V 
25 
29.732 
60.0 
29.691 
62.0 
54 
55.8 
58.0 
52.0 
59-3 
N 
Light rain—cloudy and overcast. 
¥ 
26 
29.691 
60.0 
29.720 
63.0 
53 
55.0 
60.0 
53-2 
62.8 
E 
Light rain—cloudy and overcast. 
h 
27 
29.821 
62.0 
29.821 
64.5 
57 
60.8 
64.0 
62.8 
66.9 
E 
Cloudy—showery. 
0 
28 
29.905 
67.5 
29.834 
66.0 
56 
58.9 
60.0 
50.0 
64.0 
NE 
Overcast. 
3 ) 
29 
29.746 
58.5 
29.839 
59-5 
54 
52.0 
54.0 
51.0 
55.0 
NE 
Continued rain—overcast. 
$ 
30 
29.924 
58.5 
29.938 
59-5 
55 
53-0 
54.8 
51.0 
55-5 
W 
Continued rain—overcast. 
9 
31 
29.924 
58.2 
29.930 
60.5 
52 
5 - 1-5 
57.0 
51-5 
59.8 
E 
Dark and overcast. 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
Mean 
30.013 
57*9 
29.993 
58.8 
45.8 
53-6 
58.0 
46-3 
70.0 
Monthly Mean of the Barometer, corrected for Capillarity and reduced to 32° Fahr. 
g A. M. 
29.950 
3 P.M.) 
29.928 s 
OBSERVANDA. 
Height of the Cistern of the Barometer above a Fixed Mark on Waterloo Bridge ........ S3 ft. 2 J in, 
. above the mean level of the Sea (presumed about) = 95 ft. 
The External Thermometer is 2 feet higher than the Barometer Cistern. 
Height of the Receiver of the Rain Gage above the Court of Somerset House. = 79 ft. o 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. 
MDCCCXXVII. 
