F 4
At Hongkong there has been a similar defect of wind velocity, which has hitherto been attributed to instrumental rather than climatic causes.
The results may be grouped into the following periods:
1884-1887, mean annual velocity 13.9 m.p.h.
1888-1893 13.1
1894-1897 13.6
1898-1900 12.8
1901-1905 12.4
1906-1911 12.7
1912-1915 11.6
From which it will be seen that the wind velocity has decreased more or less steadily from 1885.5 to 1913-5, with partial recoveries at 1895.5 and 1908.5.
If the results be grouped from 1884-1900 and from 1901 to 1915, it will be found that the mean velocity for the former period was 13.33 m.p.h. and for the latter period, 12.29 m.p.h., indicating a defect of 136,731 miles of wind, which is far greater than the secular variations in any other element, and must, at least in part, be attributed to instrumental causes. There will probably be a partial recovery from the very low values of 1913-1915, however.
Rainfall at Four Stations.—In the following table the monthly rainfall at the Observatory is compared with the fall at the Police Station, Taipo; the Botanical Gardens; and the Matilda Hospital, Mount Kellet :-
Months. Observatory (Kowloon). Police Station (Taipo). Botanical Gardens (Hongkong). Matilda Hospital (Hongkong). January, 0.345 inches. 0.50 inches. 0.54 inches. 0.54 inches. February, 0.505 0.90 0.51 0.10 March, 2.640 3.24 3.73 2.43 April, 1.795 2.84 2.71 2.45 May, 12.760 18.67 12.17 10.58 June, 11.960 9.92 12.61 11.63 July, 15.410 24.80 16.13 11.31 August, 10.520 10.45 9.35 7.18 September, 5.715 2.77 6.28 7.60 October, 11.710 6.03 12.97 10.80 November, 1.890 3.82 2.51 2.80 December, 0.775 1.31 0.98 1.58 Year, 76.025 85.25 80.49 69.00F 4
At Hongkong there has been a similar defect of wind velocity, which has hitherto been attributed to instrumental rather than climatic causes.
The results may be grouped into the following periods:
1884-1887, mean annual velocity 13'9 m.p.h.
1888-1893
13.1
1894-1897
13.6
1898-1900
12.8
11
1901-1905
12:4
1906-1911
12.7
11
1912-1915
11.6
11
From which it will be seen that the wind velocity has decreased more or less steadily from 1885'5 to 1913-5, with partial recoveries. at 1895-5 and 1908-5.
If the results be grouped from 1884-1900 and from 1901 to 1915, it will be found that the mean velocity for the former period was 13.33 m.p.h. and for the latter period, 12:29 m.p.h., indicating a defect of 136,731 miles of wind, which is far greater than the secular variations in any other element, and must, at least in part, be attributed to instrumental causes. There will probably be a partial recovery from the very low values of 1913-1915, however.
Rainfall at Four Stations.—In the following table the monthly rainfall at the Observatory is compared with the fall at the Police Station, Taipo; the Botanical Gardens; and the Matilda Hospital, Mount Kellet :-
Months.
Observatory Police Station
(Kowloon). (Taipo).
Botanical Matilda Gardens Hospital (Hongkong). (Hongkong).
inches.
inches.
inches.
inches.
January,
0*345
0'50
0'54
0'54
February,
0'505
o'90
0'51
O'10
March,
2'640
3'24
3.73
2'43
April,
I'795
2.84
2'71
2'45
May,
12'760
18.67
12 17
10'58
June,
11.960
9'92
12.61
11-63
July,
15'410
24.80
16.13
11°31
August,
10'520
10'45
9'35
7:18
September,...
5'715
2.77
6.28
7·60
October,
11.710
6:03
12.97
10*80
November,
1-890
3.82
2'51
2.80
December,..
0'775
1°31
0'98
1.58
Year,...
76·025
8525
80'49
69.00
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