582 MR. HUDSON’S HOURLY OBSERVATIONS ON THE BAROMETER. 
Fourth set of fifteen days’ Observations. June 10th to June 24th, 1831. 
Mean Times 
of 
Observation. 
Number of 
Observations 
at each hour. 
Number of 
Interpola- 
tions. 
Barometer. 
Attached 
Thermometer. 
Barometer 
reduced to 
32°. 
Difference of 
Barometer 
from Mean. 
Difference of 
Thermometer 
from Mean. 
h 
A.M. 6 
m 
4 
6 
9 
inches. 
29-996 
69-3 
inches. 
29-882 
— •002 
+ 0-3 
7 
2 
8 
7 
29-997 
70-4 
29-880 
— •004 
+ 1-4 
8 
4 
10 
5 
29-994 
70-2 
29-878 
—•006 
+ 1-2 
9 
0 
15 
0 
29-992 
69-8 
29-877 
-•007 
+ 0-8 
10 
1 
14 
1 
29-992 
69-5 
29-878 
— •006 
+ 0-5 
11 
2 
14 
1 
29-992 
69-0 
29-879 
-•005 
0-0 
12 
1 
14 
1 
29-992 
68-9 
29-880 
— •004 
-0-1 
P.M. 1 
0 
14 
1 
29-992 
69-1 
29-880 
-•004 
+ 0-1 
2 
0 
14 
1 
29-996 
68-7 
29-884 
•000 
-0-3 
3 
0 
15 
0 
29-997 
69-5 
29-883 
— •001 
+ 0-5 
4 
2 
13 
2 
29-997 
69-6 
29-882 
— •002 
+ 0-6 
5 
3 
14 
1 
29-994 
69-5 
29-880 
— •004 
+ 0-5 
6 
0 
14 
1 
29-995 
69-2 
29-882 
— •002 
+ 0-2 
7 
2 
14 
1 
29-997 
68-7 
29-885 
+ •001 
— 0-3 
8 
3 
12 
3 
30-003 
68-1 
29-893 
+ •009 
-0-9 
9 
5 
14 
1 
30-008 
67-5 
29-900 
+ •016 
-1-5 
10 
o 
13 
2 
30-007 
67-2 
29-900 
+ •016 
— 1-8 
11 
2 
12 
3 
30-003 
66-7 
29-897 
+ •013 
-2-3 
Mean . 
12 
3 
29-997 
69-0 
29-884 
Fifth set of fifteen days’ Observations. June 24th to July 13th, 1831. 
Mean Times 
of 
Observation. 
Number of 
Observations 
at each hour. 
Number 
of 
Interpolations. 
Barometer. 
Attached 
Thermometer. 
Barometer 
reduced to 
32°. 
Difference of 
Barometer 
from mean. 
Difference of 
Thermometer 
from mean. 
h 
A.M. 6 
m 
12 
11 
4 
inches. 
29-995 
64°-6 
inches. 
29-896 
+ •020 
-2-9 
7 
2 
15 
0 
30-000 
65-8 
29-897 
+ •021 
-1-7 
8 
6 
15 
0 
30-000 
66-2 
29-896 
+ •020 
-1-3 
9 
0 
15 
0 
29-998 
66-7 
29-892 
+ •016 
-0-8 
10 
1 
15 
0 
29-998 
67-2 
29-891 
+ •015 
— 0-3 
11 
2 
15 
0 
29-993 
67-7 
29-884 
+ •008 
+ 0-2 
12 
5 
13 
2 
29-988 
68-0 
29-878 
+ •002 
+ 0-5 
P. M. 1 
0 
14 
1 
29-984 
68-4 
29-873 
— •003 
+ 0-9 
2 
3 
15 
0 
29-979 
68-7 
29-867 
-•009 
+ 1-2 
3 
0 
15 
0 
29-975 
69-0 
29-862 
— •014 
+ 1-5 
4 
5 
15 
0 
29-970 
69-2 
29-857 
-•019 
+ 1-7 
5 
2 
15 
0 
29-968 
69-1 
29-855 
—•021 
+ 1-6 
6 
2 
14 
1 
29-968 
68-9 
29-856 
— •020 
+ 1-4 
7 
2 
14 
1 
29-970 
68-1 
29-861 
— •015 
+ 0-6 
8 
3 
15 
0 
29-974 
67-9 
29-864 
— •012 
+ 0-4 
9 
3 
14 
1 
29-982 
67-3 
29-874 
— •002 
— 0-2 
10 
7 
10 
5 
29-986 
66-8 
29-880 
+ •004 
-0-7 
11 
4 
10 
5 
29-989 
66-2 
29-885 
+ •009 
— 1-3 
Mean . 
14 
1 
29-984 
67-5 
29-876 
