740
THE HONGKONG, GOVERNMENT GAZETTE, 130 MAY, 1899.
*
Appendix A.
Results of XV Years' meteorological observations made at the Hongkong Observatory.
In Appendix B to my annual report for the year 1893 (Observations and Researches in 1893 p. 20) are given ten years' means for the daily variation of the meteorological elements. The follow- ing table shows the fifteen years' means of the annual and monthly values of the meteorological elements. It also shows the probable upper and lower limits of certain of those values, so determined that in future years the actual values observed are as likely to fall outside as they are to fall within those limits. For instance, the mean temperature of January 1897 being 63°.1, by inspecting the following table, where the upper limit is given as 61.1 for January, we learn that this month was unusually warm in 1897,--but the total rainfall for June 1896 being 18.630 inches while the upper probable limit for June is 22.792, we learn that this month was not unusually wet in 1896,-
-or the total rain-fall for May 1885 being 4.860, while the lower limit for the month is 5.178 shows that May was unusually dry in 1885. By applying the laws of chance a number of probabilities can be deter- mined when such limits are known
Mean pressure,
Upper limit,
Lower limit,
Mean pressure red. to
M.S.L.,
Mean pressure red. to
M.S.L. and to 45°, lat.
Maximum.
Minimum,
Barometric tide,......................
Mean temperature,.
Upper limit,
Lower limit,
Mean maximum,.
Upper limit,
Lower limit,
Mean minimum,.
Upper limit,
Lower limit,
Maximum,
Minimum,
Mean daily range,
Table XI.
Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. Oct. Nov. Dec. Year.
30.041 30.014 29.938 29.843 29.750 29.652 29.626|| 29.643 29.712 29.869 29.988 30.064 29.845 30.070 30.052 29.956 29.859| 29.765| 29.682 29.652 29.668 29.745 29.893 30.020) 30.092 29.854
30.012 29.976 29.920 29.827| 29.735| 29.622 29.600 29.618| 29.679| 29.845] 29.956| 30.036 29.836
30.159 30.132 30.055 29.958 29.863| 29.764|29.738 29.755| 29.824 29.982 30.103| 30.181 29.959
30.103 30.076 29.999 29.902 29.807 29.708 29.682 29.609 29.768 29.926 30.047 30.125 29.903
30.367 30.390 30.308 30.158| 30.045| 29.880| 29.882 29.851| 29.984 30.157 30.311| 30.444 30.444
20.686 29.421| 29.552 29.576 29.447 29.284 28.762 29.088| 28.876| 29.089] 29.575|29.757 28.762
0.107 0.100 0.103 0.093 0.085 0.071 0.068 0.073 0.080 0.091 0.102 0.109 0.091
59.7 57.7 62.2 69.9 76.61 80.7 81.6 81.0 80.4 76.2 69.2 62.4 71.5
61.1 60.0 63.3 71.0 77.7 81.4 82.2 81.4 81.1 77. 70.1 63.7 72.0
58.3 55.4 61.1 68.8 75.5 80.0 81.0 80.6 79.7 75.1 63.3 61.1 71.0
64.1 01.7 66.4 745 81.2 85.2 86.2 86.0 85.3 80.7 74.3 67.5 76.1
66.0 64.6 67.6 75.7 82.2 86.0 87.1 86.6 86.0 82.0 75.2 08.5 70.7
-62.2 58.8 65.2 73.3 80.2 84.4 85.3 85.4
84.6 79.4 73.4 06.5 75.5
56.0 54.5 58.9 66.7 73.5 77.4 78.0 77.3 76.6 72.5 65.3 58.3 67.9
57.4 56.6 60.0 67.7 74.4 78.0
78.7 77.7 77.5 73.7 66.3 59.8 68.3
54.6 52.4 57.8 65.7 72.6 70.8 77.3 76.9 75.7 71.3 64.3 56.8 67.5
79.2 79.0 82.1 88.6 91.5 93.6 94.0 92.9 94.0 93.8 85.6 81.9 94.0
40.3 45.9 55.6 64.1 69.2 72.1 71.6 65.6 60.8 50.6 40.7 32.0
8.1 7.2 7.4 7.7 7.7 7.8 8.2
8.7 8.7
32.0
Mean humidity,
Upper limit,
Lower limit,
Minimum,
Mean vapour tension,
Upper limit,
Lower limit,
8.3 9.0 9.2 8.2
2 2
74
79 84 86 83 $3
78
81
87 87
85
84
3883
$3 83
77
71
65 64
78
84
80
75
69
69
79
701
77 81
83
81 82 81 82 74
5
11
24 20 35 34 47 401 25
83
671 61 59
77
22 10
5
0.391 0.390 0.480 0.633 0.772 0.873 0.892 0.880 0.800 0.648 0.477 0372 0.634
0.416 0.423 0.505 0.062 0.805 0.888 0906 0.891 0.838 0.702 0.516 0.413 0.648
0.366 0.357 0.455 0.604 0.739 0.858 0.878 0.869 0.762 0.594 0.438 0.331 0.620