Table I.
Ten yearly-means of Barometric Pressure at the Observatory for each month of the Year and Mean Diurnal Variation.
. Month.
I a.
22.
3 a.
4 a,
5 л.
6 8.
2.
8 8.
9 a.
10 a.
II a. Noon. 1 p. 2 p.
3 p. 4 p.
5 p.
6 p.
7 p. 8 p.
9 p. 10 p. 11 p. Midt.
Mean.
Mean
Barometer
reduced to
sea-level.
Mean
25 years
1861-1885.
January,
+.006
February,
+.008
March,
+.008
-001 -010 -.014 -.012 ,000 +.017 +.038 +.053 +.058 .002 .011 ..016 —012 +.002 +.020 +,037 +.051 +.057 -.005 -018 -.024 -.018
+.042 +.014
+,046 +.023
-.019 -.041 -.008 —.033
-.051 -.049
-.039 -.028
-.049
-
.061
044
-.035
-.014+.001
-.022
—
April,
+.004
011
May,
+.002 -.010
Juac,
+.002
July,
+.005
.006
August,
+.005
.008
September,
.000
October,
-.001
November,
+.001
..008
December,
001 +.017 +.036 +.048 +.052 023 —.025 .017 003 +015+.033 +.045 +.047 -.019-019 014 ,000 +.016 +.030 +.038 +.041 .008-014-016-011 .000 +.013 +.023 +.029 +.031 ..013 ..016 013 -.003 +.008 +.018 +026 +.029 -.016-.018 -.014 -.005 +.009 +.020 +.030 +.032 011 -.020 -.021 ..014 .003 +.012 +.029 +.036 +.039 011 -.019-020 013 .001 +.020 +.034 +.046 +.046 +.032 +011 -.016-016 .011 +.005 +.023 +.039 +.051 +.051 +.033 +.007 †.008 —,001 —.008 —,012 —.009 +.002 +.020 +.039 +.054 +.054 +.089 +.009
+,044 +,024
-.004 -.027
-.014 ..048
-.044
-.035 -.022
+.040 +.025
.001 .020
.037 -.046
.045
-.035
.020
.010 +.015 +.015 +.012 .005 +.006 +.013 +.014 +010 .005 .012 +.019 +.020 +.016 .004 +.012 +.024 +.023 +.015
30.047
30.165
30.171
30.022
30.141
30.124
29.942
30.059
30.062
29.843
29.958
29.947
+.036 +.024
+.028 +.017
.025 .016 +.028 +.017
+.005 -.015
+.003 .012 +.003 -.011
..029 .042
-.043
..034
022-005 +.008+.021 +.021+.011
29.754
29.867
29.843
-.026
.026 .035
037 -.040 -.032
-.019
..038
.033
-.018
.000 -.017
.030 .039
.039
.032
.018
+.031 +.014
..007 -.026 -.037
..039
..037
027
.013 .034 -.043 --.044 .023 -.044 -051 -.049 026 .045 -.055 —.052
--.037
.027
.039 .026 -.040 -.028
003 +.010+.024 +.024 +.014 .000 +.015+.027 +.026 +.018 .000 +.019 .029 -.014 +.004 +.022 +.027 -.012+,008 +.020 +.022 -.008+.008 +018 +,021 -.012 +.004 +013 +.018
29,658
29.770
29.763
29.618
29.730
29.732
.028 +.019
29,650
29.762
29.735
+.024 +.016
29.706
29.818
29.817
+.020 +.014
29,878
29.991
29.983
+.020 +.013
30,000
30.115
30.107
+.016 +,012
30.060
30.177
30.157
Means..
+.004.007-016-018 -.013 .000 +.016 +.031 +.042 +0.45 +.035 +.017 —,007 -.027 040 044 -040031 017 .000 +.014 +.022 +.021 +.014
29.848
29.963
29.953
Table II.
Ten yearly-means of Temperature at the Observatory for each month of the year and Nine yearly-means of Mean Diurnal Variation.
23.
Month.
1 a.
2 a.
3 a.
4
5. 6 8.
7 B.
8 a.
9 a. 10 a. 11 a.
Noon. 1 p. 2 p. 3 p.
4 p.
5 p..
6 p. 7 p.
8 p.
9 p. 10 p. 11 p. Midt. Mean.
January,
-1.1
-1.4 -1.7
February,
March,
- 1,1
-1.0
-1.8
1.2 -1.4 1.6
-2.0 -2.1
-1.7 -1.7
April,
-1.5 -1.7
P
May,
1.2 -1.3 1.5 -1.8 -1.8 1.3 -1.4 -1.6 - 1.6
-1.6 -1.7
1.7
June,
1.3
1.4
-1.5
-1.6
1.7
-1.8 -1.7.
-1.5
1.5
-2.1
- 1.7
1.4
-1.2
July,
A
1.6
-1.7
- 1.9
1.9
2.1 -1.8
August,
-1.7 -1.9
-2.0
-2.2
September,
-1.6
J
1.9
-2.0
-2.1
October,
1.9 -2.1
-2.2 -2.2
2.2
2.4
November,
December,
-2.3
-2.0 -2.3
-2.3 -2.4 −1.7 -0.3 +0,9 +1.8 +2.5 +2.9 +3.0 +2.9 +2.5 +1.8 +0.9 -2.5 -2.7 -2.3 -0.7 +0.7 +1.8 +2.6 +3.1 +3.3 +3.2 +2.8 +2.0 +0.9 +0.1 -2.5 -2.7 −2.5 −1.1 +0.4 +1.7 +2.6 +3.1 +3.4 +3.3 +2.9 +2.1 +1.0 +0.2
Means,..
-1.5 -1.7 1.4 -1.7 1.9 -1,5 -1.8
T
−1.4 −1.6 −1.8 1.9 2.0 2.0 −1.5 −0.5 +0.5 +1.4 +2.0 +2.5 +2.7 +2.6 +2.4 +1.8 +1.0 +0.2 −0.8 −0.5 −0.6 −0.8 -1.0 -1.2
-1.2 0.0 +1.1 +1.8 +2.4 +2.7 +2.8 +2.6 +2.0 +1.1 +0.1 -0.2 -0.3 -0.4 -0.6 -0.8 -1.1 -1.0 -0.1 +0.7 +1.4 +1.9 +2.3 +2.3 +2.1 +1.6 +1.0 +0.3 0.0 -0.1 -0.2 -0.3 .0.6 -0.8
0.3
0.0 +0.8 +1.3 +1.6 +2.1 +2.0` +1.9 +1.5 +0.9 +0.1 -0.2 -0.3 −0,2 +0.6 +1.3 +2.1 +2.4 +2.6 +2.4 +2.1 +1.7 +0.8 0.0 -0.4 ·0.6 -0.7 -0.9 -0.2 +0.6 +1.2 +1.7 +2.1 +2.4 +2.1 +2.0 +1.6 +0.9 +0.1 -0.4 -0.7 +0.1 +0.8 +1.4 +1.9 +2.3 +2.4 +2.3 +2.0 +1.4 +0.8 +0.1 -0.5 - 1.4 0.0 +0.6 +1.2 +1.9 +2.3 +2.5 +2.5 +2.5 +1.9 +1.4 +0.5 -0.3 -0.6 1.1 +0.1 +0.9 +1.6 +2.4 +2.8 +2.8 +2.9 +2.7 +2.2 +1.4 +0.4 -0.5 -1.5 -0.3 +0.7 +1.7 +2.4 +2.8 +3.1 +2.9 +2.6 +2.1 +1.1
59.4
-0.7
57.3
-0.3
0.4
0.6
62.0
0.8
-0.9
1.0
69.7
-0.5 -0.6 -0.7 -0.8 -0.8 -0.9
-0.9 -1.1
76.2
-1.1
-1.2
80.5
0.9
-1.0
1.3 1.4
81.5
-0.7
1.0
-1,2
1.4
1.6
80.9
0.0
0.0 0.4
.0.3
-0.2
-0.6
-0.9
-1.0
1.3 1.5
80.1
0.0
-0.5 0.7 -0.4 0.7 -0.9 -0.4 -0.6 -0.8
1.0
1.2 -1.4
76.3
- 1.2
1.4
69.0
-1.0
1.3
62.5
71.3
251
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