230 
MR. LUBBOCK ON METEOROLOGICAL OBSERVATIONS. 
Since this paper was read, Mr. Hudson has made some observations with a 
view to determine the diurnal variation of the barometer ; they were begun on 
the 26th of April, and have been continued to the present time, June 13th. The 
results are exhibited in the following Table, which seem to indicate a mini- 
mum about 6 o’clock p.m. 
Mean Times 
of Obser- 
vation. 
Number 
of Obser- 
vations. 
Barometer. 
Attached 
Thermo- 
meter. 
Barometer 
corrected, and 
reduced to 32°. 
Difference 
of Barometer 
from Mean. 
A. 
M. 
h. 
m. 
9 
0 
49 
29.900 
61.4 
29.821 
+ .025 
10 
4 
43 
29.885 
62.8 
29-803 
+ .008 
11 
2 
47 
29-895 
62.4 
29-814 
+ .019 
12 
3 
38 
29-902 
63.3 
29.819 
+ .024 
P 
1 
M. 
4 
43 
29.866 
63.5 
29-783 
-.012 
2 
3 
44 
29.887 
63.8 
29.803 
+ .008 
3 
1 
49 
29.880 
63.4 
29-797 
+ .002 
4 
3 
40 
29.868 
64.1 
29-783 
—.012 
5 
2 
44 
29.856 
63.5 
29-773 
-.022 
6 
4 
39 
29-837 
63.6 
29.753 
— .042 
7 
3 
37 
29.877 
63.2 
29.794 
-.001 
8 
4 
36 
29.858 
61.5 
29-779 
-.016 
9 
3 
38 
29.863 
61.0 
29-785 
—.010 
10 
2 
33 
29.896 
60.8 
29.819 
+ .024 
11 
2 
34 
29.884 
60.9 
29.806 
+.010 
11 
57 
34 
29-874 
60.4 
29.790 
— .005 
Mean 
29.877 
62.6 
29.795 | 
