SUPPLEMENT TO THE HONGKONG GOVT GAZETTE OF 31st MAY, 1884. 515
Table X exhibits the Amount (0-10), Name and Direction, whence coming, of the Clouds. Where the names of Upper and Lower Clouds are given, but only one Direction, this refers to the Lower Clouds. The prevailing Direction of the Wind at the Observatory, as shewn in Table VIII, was E; at the Peak, as shewn in Table IX, ESE; that of the Lower Clouds was SE and the Direction veered with increasing height, the highest clouds coming from W. On an average 84 per cent of the sky was clouded.
Table XI and Table XII exhibit the readings of the Barometer and the Thermometers at Victoria Peak and at Cape d'Aguilar. The Barometer was not properly registered till the 19th.
The Mean Temperature was 62.6 at the Peak and 65.9 at Cape d'Aguilar, the Highest was 75.9. on the 22nd at the Peak and 80.8 on the same day at Cape d'Aguilar, and the lowest was 47.8 on the 3rd at the Peak, and 54.6 on the 2nd at Cape d'Aguilar.
The Mean Temperature in Hongkong decreased one degree Fahrenheit for every 501 feet ascended.
Table XIII exhibits the Relative Humidity as determined from observations of the Dry and Damp Bulb Thermometers.. The Mean Relative Humidity at the Observatory was 86, at Cape d'Aguilar 95, at the Peak 96. These numbers are reduced to the mean of the 24 hours by aid of Table IV. The Least Relative Humidity registered was 60 at 4 p. on the 22nd at the Observatory; 68 at the same time at Cape d'Aguilar, and 66 at 10 a. on the same day at Victoria Peak.
Table XIV exhibits the Tension of Aqueous Vapour at the Observatory and at the Peak. The Mean Tension was 0.594 inches at the Observatory, and 0.546 inches at the Peak. These numbers are reduced to the mean of the 24 hours by aid of Table IV. The Greatest Tension registered was 0.832 at 10 a. on the 26th at the Observatory, and 0.772 at the same time at the Peak. The Least Tension was 0.296 at 10 p. on the 2nd at the Observatory, and 0.331 at the same time at the Peak.
Table XV exhibits the amount of Rain measured at 10 a. on the following day, and the duration of Precipitation at the Observatory. The greatest amount of Rain fell on the 11th, when it rained. 1.220 inches at the Observatory, 1.47 at Stone Cutters' Island, and 1.32 at the Peak.
Thunder and Lightning occurred on the 4th, beginning early in the morning and ending after noon; on the 11th and 12th, beginning in the evening of the 11th and ending about noon next day; and on the 26th, beginning in the afternoon and ending next morning, after raging furiously the whole night.
Thunder was heard but no Lightning seen on the afternoons of the 12th and the 25th.
Lightning was seen but no Thunder heard on the 20th, beginning in the evening and ending early next morning; on the 21st, beginning in the afternoon and ending early next morning; on the 24th, beginning in the afternoon and ending early next morning; and on the 25th, beginning in the afternoon and ending early next morning,
Unusual Visibility was noticed on the 1st and the 15th.
Dew fell during the night between the 21st and the 22nd.
Fog occurred in the morning and in the evening of the 5th and in the morning of the 7th.
Fog prevailed extensively at Cape d'Aguilar and at Victoria Peak.