300 SUPPLEMENT TO THE HONGKONG GOVT GAZETTE OF 17TH APR., 1886.
Table IV exhibits the tension of vapour expressed in inches of mercury at the Observatory and at the Peak, the latter being the mean of observations made at 10 a,, 4 p. and 10 p., and the excess of the hourly values above the mean at the Observatory. The daily variation, as was to be expected from a coast station, is small, but there is less vapour in the air in the morning than in the evening. summer the daily variation is nearly insensible.
In
The monthly extreme ranges in vapour tension (at 10 a, 4p. and 10 p.) are exhibited in Tables XVI and XVII. They were greatest in November
The
The annual variation of the vapour tension was about the same as in the previous year. maximum monthly mean occurred in June at the Observatory and in July at the Peak, the minimum in February at both stations. The mean relative humidity was greatest in April at the Observatory and in May at the Peak and was least in November at both stations.
Table V exhibits the total number of hours of bright sun-shine. The daily maximum fell about 11 a. and there was a little more sun-shine in the forenoon than in the afternoon, just the opposite of the previous year. The monthly minimum occurred in February and the maximum in October. The minimum in percentage of possible duration occurred in February and the maximum in December The record on days on which the sun shone without interruption from sunrise to sunset having beer compared with the time during which the sun was above the horizon, it was found that the sun is no strong enough to make a trace till 0.4 hours after its time of rising or before setting, calculated withou taking refraction or diameter into account, and the total possible durations shown in the last but one column have been calculated by taking this into account. It was owing to the uncertainty of this quantity, that the percentage of possible duration was not exhibited in last year's report. It would obviously have been wrong to calculate on the supposition, that the sun was strong enough to marl the card from sunrise to sunset.
Table VI exhibits the total hourly rainfall. It appears, that there is a regular daily variation the maximum falling about 9 a. and the minimum about 5 p. June was the wettest month and November the driest. The greatest falls of rain are exhibited in Table XVI. It will be remarke that 12.63 inches of rain fell on the 12th June at the Observatory and 14.50 at the Peak.
Table VII exhibits the number of hours, during portion of which, it rained. The data in thi table should be used only for comparison, the correct total duration of rain being exhibited in Tabl XI. It appears from this table, that it rains more often about sunrise than about sunset.
These tables were omitted in last year's report, as conclusions concerning the fall of rain ar occasionally drawn on insufficient data. They are exhibited below. and confirm the remarks mad aboye,
Total Hourly Rainfall during ten months of the year 1884.
Month.
1 a. 2 a. 3 a.
5 a. 4 a.
6 a. 7 a. 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,
Sam
March,
April.
May,
June,
July,
August,
•
September,
October,
November,
December,
.065 .015 .025 .040 .005 .075 .125
0.132 0.070 1.375 0.268 0.092 0.123 0.099 0.015 0.845 0.009
.200 250
.390 .225 .235 117 .185 .187 1.278 .220 0.895 0.065 0.030 0.015 030 .064
.035 .075 .025 .135 .240 .505 .795 .080 .020 .084 .800 1.215.045 840 810 520
.145 .280 280
.940 .160 370 315 2.145 .790
.230 235
.315 855 1.515 1.005
.075
.210 .185
.510 1.295 1.020 .920 2.085 1.145 .160
.790 .660 .740
.256 .720
.*25 .630
.400 250 .565 1.390
.265 .615, 1.005
.020 .725 250 455
.250 .340 .220
445 1.105 1.280 1.070 .700
.475 .420 125 040
.080
.110 .335 .150 .070
.005 .030 .010
.250 .070
.730 .285 .145
.025 .050 .010
.135 .135 210
* 0.065 0.098 0.842 0.250 0.005 0.625 0.396 0.085 0.495 0.443|| 5.82′
.030 235 055 010
.115
.310
:;
.155
.470 .315 325 690
.100 .015 .090 100
.010 .055 .015
.025 185 .150 5.28
675 1.265
9,03: .715 .280 180 010145 045
.145 225 .805 345 155 065 050 100 11,03
.175 .115
.115 .015 140 18,07 .305 230 .400
.265 .905
.435 .250
.015 .170 1.070
.975 1.195 .520.100 .190 .380
.105 .010.
.015 120 175 165
.140 .100 170 .050 .040
4
.355 10.81
.660 19.37
3.08
1.49
Sums....... 1.002 3.155 4.040 3.738 3.177 5.170 3.709 4.402 3.763 1.218 4.120 3.480 2.110 2.995 2.595 2.057 3.007 3.895 3.295 2.900 2.486 1.095 1.500 2.188 79,00
Month.
Number of Hours, during portion of which it rained, during ten months of the year 1884,
1a. 2 a. 3 a. 4 a. 5 a. 6 a. 7a. 8 a. 9 a. 10 a. 11 a. Noon. 1 p. 2p. 3p. 4p. 5 p. 6 p. 7 p. 8 p. 9 p. 10 p. 11 p. Midt. Sur
March,
3
April,
5
May,
3
June,
5
July,
4
August,
September,
5
October.
1 4
November...
2 1
bad H C . OF CO HA CON
2
3
4
3
5
5
December,
:
1 10 10 10 10022:
2++++
3
4
4
3
6
5
5
I 2 1
- 10 ~~:
110 co to 10 227
CLŁO COCO LO CON
50 40 10:00 00:10 03H
5
1
4 4
4
1 5
2
5
1
2 3 3
10:00 10:
8
5
Sums.......... 28 31 37 35 34 35 33 32 35 34 26
31
شعر له الا الله
1
3
1 3
2 2 2
1220142eo ko osi
2
2464612-⠀⠀
09 09 10 4222--
HANN
3
2 1
3
3
1 2 2
5
8 4
5
3
4
2
1
202.02N A
2
2
2
42
2
3
72
1
2
4
86
3
5
102
4
2
129
3
1
4
8
2
2
2
69
2
2
37
1
2
1
2
B
૩૯
...
23 19 20 27 23 23 20 24 27 19 19
30
ོ
662
a.