672751-1884-Weather-Report-February-1884- — Page 2

203 SUPPLEMENT TO THE HONGKONG GOVT GAZETTE OF 22ND MAR., 1884.

Table I exhibits the readings of the Barometer reluced to 32.0 Fahrenheit, but not to Sea Level, at the Observ...ory and at Victoria Peak.

The Mean Height of the Barometer at the Observatory was 30,061, and at the Peak 28.244 inches. The atmospheric tide can scarcely have appreciably exceciled 0.109 at the Observatory. The Barometer at the Peak is not sensitive enough for determining the atmospheric tide at that altitude. The highest reading of the Barometer registered at the Observatory was 30.311 at 10 a. on the 24th; and at the Peak, 28.458 at the same time. The lowest reading was 29.809 at 4 p. on the 3rd at the Observatory and 28.029 at the same time at the Peak.

Table II and Table III exhibit the readings of the Thermometers (Fahrenheit) at the Observatory, Cape d'Aguilar, and the Peak.

The Mean Temperature during the month was 57.2 at the Observatory, 56.3 at Cape d'Aguilar and 50.6 at the Peak. The Highest Temperature registered was 70.0 on the 3rd, at the Observatory; 65.0 on the 18th, at Cape d'Aguilar; and 63.5 on the 28th, at the Peak. The Lowest Temperature was 42.8 on the 7th, at the Observatory; 43.6 at Cape d'Aguilar; and 35.8 on the same day, at the Peak.

The Mean Temperature in Hongkong decreased one degree Fahrenheit for every 280 feet ascended. Table IV exhibits the Relative Humidity in percentage of saturation (the Humidity of air satur- ated with moisture being 100) as determined from observations of the Dry and Damp Bulb Thermom- The Mean Relative Humidity at the Observatory was 78, at Cape d'Aguilar 88, at the Peak 88. The Least Relative Humidity registered at the Observatory was 36 at 4 p. on the 24th; 45 at the same time at the Peak; and 44 at 10 p. on the same day at Cape d'Aguilar.

eters.

Table V exhibits the Tension of Aqueous Vapour present in the Atmosphere at the Observatory and at Victoria Peak, expressed in inches of mercury. The Mean Tension was 0.377 inches at the Observatory and 0.337 inches at the Peak. The Greatest Tension registered at the Observatory was 0.517 at 10 p. on the 19th; and at the Peak 0.535 at 10 a. on the 3rd. The Least Tension was 0.173 at 4 P. and 10 p. on the 7th at the Observatory; and 0.156 at 4 p. on the same day at the Peak.

Table VI exhibits the amount of Rain collected at 10 a. on the following day, and the Duration of Precipitation as estimated at the Observatory. The greatest amount of Rain fell on the 3rd when it rained 1.266 at the Observatory, 1.34 at Stone Cutters' Island, and 1.75 at the Peak.-It appears that the amount of Rain increased with the altitude of the Observer in Hongkong.

The Rain at Stone Cutters' Island is, by order of Captain THOMSETE, R.N.. Harbour Master, etc., measured by the officer in charge of the Gunpowder Depôt. The gauge is situated about 15 feet above Sea Level and 28 inches above the Ground.

Table VII exhibits the Direction (to two points) and Force of the Wind (0-12) and Sea disturb- ance (0-9). The portion of the register that refers to 4 a., as well as the Sea Disturbance at the other hours, has been derived from observations made at the Light-houses.-The Mean Force of the Wind was 3.1, corresponding to a velocity of 18 miles per hour. The Mean Direction was ENE. The Force of the Wind was greatest in the early morning hours.

Table VIII exhibits the Direction and Force of the Wind at Victoria Peak. The Mean Direction was ENE., and the Mean Force 4.2 corresponding to a Velocity of 24 miles per hour.

Table IX exhibits the Amount, Name and Direction, whence coming, of the Clouds. When the names of Upper and Lower Clouds are given, but only one Direction, this refers to the Lower Clouds. The prevailing Direction of the Lower Clouds was from E. or North of E., but on several days they were observed to come from W. or SW. The Mean Direction of the Highest Clouds was W. average 67 per cent of the sky was clouded. The Nebulosity was greater during the day than during the night.

On an

Drizzling Rain, while the instruments were being read off, was registered at the Observatory on the 2nd at 10 p., the 11th at 4 p., the 12th at 10 a., the 14th at 10 p., the 15th at 4 p., the 17th at 4 p., the 18th at 10 p., the 19th at 10 p., and the 20th at 10 a.

10

It was raining while the instruments were being read off on the 3rd at 4 P., the 12th at 4 p. and 10 p., and the 17th at 10 a

P.

and 10 p.,

the 5th at

Unusual Visibility was noted on the 4th, the 21st, the 28th, and the 29th.

Dew fell on the 18th at 10 p. and on the 21st at 10 p.

A Lunar Halo was noted on the 9th at 10 p., and a Lunar Corona on the 13th at 10 p.

Fog was not noted at the Observatory, but occurred frequently at Cape d'Aguilar and at the Peak.