SUPPLEMENT TO THE HONGKONG GOVT GAZETTE OF 16TH AUG., 1884. 673
Table I exhibits the hourly readings of the height of the Barometer reduced to 32.0 Fahrenheit, not to Sea Level, as measured (at two minutes to the hour named) from the Barograms. The Mean Height of the Barometer was 29.662, the Highest was 29.791 at 10 p. on the 3rd, and on the goth, and the Lowest was 29.444 at 4 p. on the 28th. The Barometric Tide amounted to 0.068.
Table II exhibits the hourly readings of the Temperature (Dry Bulb Thermometer) as measured from the Thermograms (at two minutes past the hour named), and also the Extreme Temperatures ring the day. The Mean Temperature was 80.1, the Highest was 91.1 at about 2 p. on the 22nd i the Lowest was 72.6 at about 4 a. on the 1st.
•
Table III exhibits the hourly readings of the Temperature of Evaporation (Damp Bulb Thermo- meter) as mensured from the Thermograms (at two minutes past the bour named) and also the Solar
Aliation Maximum (Black Bulb) and Terrestrial Radiation Minimum Temperatures.
Table IV exhibits the Mean Relative Humidity in percentage of saturation (the humidity of ir saturated with moisture being 100) and the Mean Tension of Aqueous Vapour present in the air expressed in inches of mercury, for every hour in the day and for every day in the month. The Mean Tension, which exhibits a small daily variation, was 0.850. The Mean Relative Humidity, which exhibits a great daily variation, was 83.
Table V exhibits the Duration of Sun-shine as registered by aid of the Sun-shine Recorder from half an hour before to half an hour after the hour named. The Sun shone 149.2 hours during the month.
Table VI exhibits the amount of Rain registered from half an hour before to half an hour after the hour named. The Total Rain-fall during the month was 11.035 inches. It rained during 81
The greatest Hourly Rain-fail was 2.030 at 6 a. on the 30th.
Lours.
Table VII exhibits, for every hour in the day, the Velocity of the Wind and its Direction in nimbers (8-E, 16-S, 24-W, 32-N) as measured from the Anemograms. The Velocity is the amber of miles traversed by the Wind, from half an hour before to half an hour after the hour named. Direction is read off at the hour, except when the Wind is very light and changeable, when the vrage Direction during the hour is estimated, taking into account the Velocity from different quarters. The Direction is not noted when the Velocity is below 1.5 miles an hour.
The Mean Velocity was 14.7 miles an hour. It was greatest during the middle of the day. The Velocity exceeded 35 miles an hour at Noon on the 3rd.
The Total Distance travelled by, as well as the Duration and average Velocity of Winds from different quarters were as follows:-
Direction.
Total Distance.
Duration.
Velocity.
Miles.
Hours.
Miles per
bour.
N
37
4
9.2
NE
262
22
11.9
E
5,285
332
15.9
SE
742
62
12.0
S
2,036
130.
15.7
SW
1,665
101
16.5
W
396
34
11.6
NW
115
16
7.2
Calm
15
19
0.8
Te VIII exhibits, for every hour in the day, the Velocity of the Wind reduced to 4 and also to , as well as thie Mean Direction of the Wind. The Diurnal Variation of the latter was
TEN exhibits the Direction (to two points) and Force of the Wind (0-12) at Victoria Peak. ite Force of the Wind was 4.0 corresponding to 23 miles an hour. The Sea Disturbance
ted in the same table has been derived from observations made at Cape d'Aguilar.