Station: Royal Observatory, Hongkong
Height above M.S.L. 109 ft.
Barometer at M.S.L. and
Day.
reduced to gravity at
latitude 45°.
Air Temperature.
1917.
Month of May.
Tension of
Vapour.
Relative
Humility.
Wind.
Direction and Force.
Amount of
Cloud.
Long, 7* 56* 41*8 E.
Lat. 22° 18' 13-2" N.
Rainfall.
Remarks.
1917.
71.
I P.
9 P.
7 n.
1 p.
9 p.
Max.
Min.
Daily Daily Means. Moans.
Daily
70.
I p.
9 P. Means.
May.
Ins.
in.
%
n
D
▸
1
29.951 29.954
29.937
61.7
72.8
66.3
73.0
59-7
0.389
бо
Dir Vel. Dir. Vel. Dir. Vel, points.in p.h. polnts m.p.k. points | m.p.b.|
17
(0-10.)
J.
-979
.941
-935
64-4
74.5
70.2
75-1
62.7
•440
61
[
10
77
1.7
***
17 8
3.0
.868 .796
830 67-3
79.4
71.8
80.1 64.8
-539
68
26
3 10
1.7
.832
.814
.816
69.7
77.6
71.6
80.0
68.4
.621
74
9
1 I
9
3.9
Slight fog. Dew.
Haze.
Haze, Dew, Lunar Corona.
.831
.792
.845
72.3
74-9
64.0
75.3
60.8
.655
86
10
16 I
9.4
0.620
-935
-939
.946
72.3
67.8
73.7
62.7
-378
56
3
7
32 17 7
4
6.0
0.010
.922
.859
.832
67.7
72-7
68.8
72.9
65-7
.509
72
$
7 20 7
7.6
Lunar Corona,
.765
-745
-752
69.9
75.6
71.7
77.8
68.3
.679
87
TJ
5
9 19 7
8.3
0.010
736
.740 -776
73.7
80.3
74-7
82.3
71.8
-770
86
10
22
10
-758
.764
-755
74-1
80.3
74.6
81.6
72:7
•774
86
10
6
24
II
.729
.704 .677
73.6
79.1
76.5
83.3
72.7
-790
86
12
喝...
[2
-708
-713
.705 78.3
84.8
79.8
85.8
-6.4
.861 83
16
7
18
13
.73+
-742
-748
79.6
83.6
80.4
85.7
79.2
.886 83 16
9
20 17
14
.789
.783
.Bot
80.2
83.8
80.2
85.4
79.6 .886 83 18
19 TC
.816
.807
.827
81.4
82.6
80.1
85.0
75-5
.882 84 17
7 16
16
.833
.843
.875
75.0
73.6
70.6
77-4
69.8
.769 94
9
27
JALAN KKO:00 ON
9
8.2
4
Unusual Visibility.
7.2
Unusual Visibility,
2
8.9
0.005
Slight fog.
8.5
9.2
8.2
Solar halo.
8
7
9.6
0.360
Thunderstorms,
15 10.0
3.630
Thunderstorms,
17 .895
.901
.960
69.3
70.9
68.4
71.6
68.4
.675
93
4
3 10.0
2.025
Thunderstorms.
18
.960
.981
.963
69.3
72.1
71.7
73.2
69.0
.653
6
18
7
7 21 10.0
0.020
19
+977
.970
.934
72.0
75.3
73.1
76.1
71.2
.645 79
3 12
20
13
8.0
20
.918
.908
.866
72.6
76.1
72.7
76.7
71.5
.676
20 9 22 10 9
5.8
21
.866
.845 .852
73.6
78.7
74.5
R0.3
71.1
-730
12
3
2.5
22
.844
.835
.829
75.6 79-5
75.4
80.2
73.1
-770
85
9
9
8
17
16
2.3
23
.840
.822
.811
76.3 83-3
78.4 85.1
74.6
.823
10 3
16
8
6.1
24
.815
.837
.853
77-7
78.0
72.8
78.9
71.8
-841
92
28 2
26 2
7
20 10.0
1.860
Dew, Inze. Dew.
Haze, Lightning.
Lightning.
25
.829
.841
.822
70.6
68.9
70.4
72.5
68.-
.670
90
7
26
26
21 10.0
0.360
26
.814
.816 .805
71.2
71.8
72.8
73.0
69.4
-719
92
7 20
7 17
2010.0
0.205
27
.832
.840 .843 73.0
76.8
75.1
77.3
72.3
.794
92
10 13
12! 9.7
0.240
28
.798 -792
.781
75.2
78.4
76.1
79.2
74.8
.845
93
29
-745
.733
715
77-3
84-7
76.5
86.3
76.1
.871
I
86
30
-746 ·746
.742
79.8
84.1
80.5
88.0
76.8
.905 85 28 2 24
∞ 000
9
8.16
8.8
0.000
Solar halo, Luar halo, Slight fog.
3
18
31
-775 .783
.787
80.8
86.1
81.2 89.6
79.2
.926 ! 84 24 4 19
ON 1000
9
2 8.7
0.220
Slight fog, Lunar balo.
19
6.7
0,030
Slight fog.
74
Lunar balo.
Sums,
Means 29.834
29.826 29.826
73.1
77.8
73.8
79.4
70.9
0.722
82
9.5 7.4 10.0 12.6 8.8 9.9
7-3
9.685
In reducing the barometer readings to gravity at latitule 457, a constant correction of −0·055 iuch has been applied.
( Zb 5 )
315