938 SUPPLEMENT TO THE HONGKONG GOVT GAZETTE OF 13тп DEC., 1884.
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 about ESE; at the Peak, as shewn in Table IX, S by E; the Direction of the Lower Clouds was SSE. On an average 63 per cent of the sky were clouded.
Table XI and Table XII exhibit the readings of the Barometer reduced to 32.0 Fahrenheit but not to Sea Level, and the Thermometers at Victoria Peak and at Cape d'Aguilar.
The Mean Height of the Barometer at the Peak was 27.892. The Mean Temperature was 74.7 at the Peak and 81.5 at Cape d'Aguilar, the Highest was 80.9 on the 11th at the Peak and 91.3 on the 19th at Cape d'Aguilar, and the lowest was 70.0 on several days at the Peak, and 73.6 on the 29th at Cape d'Aguilar.
The Mean Temperature in Hongkong decreased one degree Fahrenheit for every 240 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 83, at Cape d'Aguilar 90, and at Victoria Peak 97. These numbers are reduced to the mean of the 24 hours by aid of Table IV. The Least Relative Humidity registered was 58 at 4 p. on the 15th at the Observatory; 70 at 10 a. on the 28th at the Peak, and 72 at 10 a. on the 19th at Cape d'Aguilar.
Table XIV exhibits the Tension of Aqueous Vapour at the Observatory and at the Peak. The Mean Tension was 0.908 at the Observatory, and 0.816 at the Peak. The Greatest Tension registered was 1.026 at 4-p. on the 22nd at the Observatory, and 0.939 at 4 p. on the 11th at the Peak. The Least Tension was 0.799 at 10 p. on the 28th at the Observatory, and 0.663 at 10 a. on the 28th 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 fell on the 20th when it rained 3.710 at the Observatory, 6.87 at Stone Cutters' Island, and 4.80 at the Peak.
Thunder and Lightning continued from the evening of the 30th June up to the morning of the 3rd July and a Thunderstorm passed between 4 a. and 8 a. on the 1st.
Lightning and distant Thunder were registered in the evening of the 3rd and continued till the following morning.
Thunder was heard in the afternoon of the 10th, and at 8 p. a slight Thunderstorm passed but not close.
Faint Lightning was registered in the evenings of the 11th, the 12th and the 16th.
Faint Thunder and Lightning were noticed during the day on the 17th, during the following night and in the evening on the 18th.
Strong Lightning was seen in the evening of the 19th and also faint Thunder heard during the following night.
Faint Lightning was noticed in the evening on the 20th.
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During the night strong Thunder and Lightning were observed, which culminated in a heavy Thunderstorm that passed over the Observatory at 6h. 15m. a. followed by another at 8h. 30m. a.
The following night Lightning was seen and faint Lightning in the evening on the 22nd. Faint Lightning was seen in the evening on the 23rd, Thunder and Lightning prevailed during the following night and distant Thunder was heard all day on the 21th. A severe Thunderstorm passed overhead at 8h. 40m. p. Thunder and Lightning continued up to the following afternoon.
Faint Lightning was seen in the evening on the 26th, 27th and the 28th.
Unusual visibility was noticed on the 5th, the 13th, the 14th, the 19th, the 22nd, and the 27th.
Dew fell in the evenings of the 5th and 21st.
A Lunar Halo was seen in the evening of the 3rd.
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Rainbows were scen at 5h. 30m. p. on the 8th and at 6 p. on the 18th.