670399-1885-Weather-Report-August-1884- — Page 6

494 SUPPLEMENT TO THE HONGKONG GOVT GAZETTE OF 23RD MAY, 1885

strong NE wind with 28.98. Wakayama a heavy S gale &c.' On the 26th at 6a. he wrote. 3 a. the stormcenter passed W of Kanazawa and lies now near Sado, advancing rapidly NE with S

And at 2p. in central Japan, E winds in the N. Cloudy rainy weather prevails in the E, &c.'

The depression has proceeded in the same direction, NE, but with a much smaller velocity an somewhat shallower; its center being near Akita with 29.095. Aomori reports strong NE with rain (1.50 inches), SW winds to gales at all other Eastern stations.' And at 9p.: The center of: depression is progressing very slowly NE and lies E of Akita, which reports 29.13 inches pressure w a N gale and 0.83 inches rain. In central Japan winds have moderated,' &c. From the tri-d weather maps issued from the Imperial Meteorological Observatory, Tokio, it appears, that the cen was in 31° 55′ N, 130° 0′ E at 2 p. on the 25th, in 34° 7′ N, 131° 55′ E at 9 p. on the 25th, in 14′ N, 137° 35′ E at 6 a. on the 26th, in 38° 50′ N, 140° 5′ E at 2 p. on the 26th and in 40° 6 N 140° 50′ E at 9 p. on the 26th, when it passed off towards ENE.

Light breezes and detached clouds prevailed over southern China till the end of the mon:... A shallow depression advancing from the W passed across northern China in about 34° latitude o the 29th.

The Barograph and the Standard Barometer at the Observatory are placed 110 feet above Meat, Sea Level. The bulbs of the Thermograph Thermometers are 111 feet above Mean Sea Level and feet above the ground. They are exposed in an unpainted and double-louvered zinc screen fixed .. the north wall of the main building in a shaded position. The Solar Radiation Maximum Thermom ter is 109 feet above Mean Sea Level and 4 feet above the ground, and the Terrestrial Radiation Minimum Thermometer is about one inch above the ground. The ground was not turfed till ti 14th. The self-recording Rain-gauge is placed 106 feet above Mean Sea Level, and the rim, which is 114 inches in diameter, is 21 inches above the ground. The cups of the Anemograph are 45 feet above the ground, and 150 feet above Mean Sea Level.

out.

At Victoria Peak the Instruments, except the Radiation Thermometers, are placed in the Look. The Barometer is 1821 feet above Sea Level. The bulbs of the Thermometers are about 4 feet above the floor, except the Maximum Thermometer, which is a few inches higher. The Radiation Thermometers are placed at the same height above the ground as at the Observatory. At Cap d'Aguilar the Thermometers are placed about 170 feet above Sea Level (according to the Government Gazette) in a wooden screen 2 feet above the ground, except the Maximum Thermometer, which is a few inches higher.

Table I exhibits the hourly readings of the height of the Barometer reduced to 32°.0 Fahrenheit. but not to Sea Level, as measured (at two minutes to the hour named) from the Barograms. The Mean Height of the Barometer was 29.625, the Highest was 29.828 at 10 a. on the 29th, and the Lowest was 29.418 at 5 p. on the 21st and at 4 a. on the 22nd. The Barometric Tide amounted to 0.076.

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 during the day. The Mean Temperature was 81.8, the Highest was 92.2 a. at 4h. 48m. p. on the 21st and the Lowest was 73.3 at 6h.2m. on the 27th.

Table III exhibits the hourly readings of the Temperature of Evaporation (Damp Bulb Thermo- meter) as measured from the Thermograms (at two minutes past the hour named) and also the Solar Radiation Maximum (Black Bulb) and Terrestrial Radiation Minimum Temperatures.

Table IV exhibits the Mean Relative Humidity in percentage of saturation (the humidity of air saturated with moissure being 100) and 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 0.886. The Mean Relative Humidity, which exhibits a great daily variation, was 82.

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 206.3 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 10.815 inches. It rained during 70 hours. The greatest Hourly Rain-fall was 0.835 at 6 p. on the 15th.

Table VII exhibits, for every hour in the day, the Velocity of the Wind and its Direction in numbers (8-E, 16-S, 24-W, 32-N) as measured from the Anemograms. The Velocity is the number of miles traversed by the Wind, from half an hour before to half an hour after the hour name!. The Direction is read off at the hour, except when the Wind is very light and changeable, when the average 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 7.0 miles an hour. It was greatest during the middle of the day. The greatest Velocity 27 miles occurred at 3 p. on the 23rd.

The Total Distance travelled by, as well as the Duration and average Velocity of Winds from different quarters were as follows;-