669952-1885-Five-day-Means-of-Meteorological-Elements-for-1884- — Page 1

SUPPLEMENT TO THE HONGKONG GOVT GAZETTE OF 28TH MAR., 1885. 273

GOVERNMENT NOTIFICATION.-No. 138.

The following Report on Five-day Means of the Principal Meteorological Elements for 1884, from

rument Astronomer, is published for general information.

By Command,

Colonial Secretary's Office, Hongkong, 28th March, 1885.

W. H. MARSH,

Colonial Secretary.

FIVE-DAY MEANS OF THE PRINCIPAL METEOROLOGICAL

ELEMENTS FOR 1884.

The following five-day means have been constructed according to the recommendations of the international Meteorological Congress.

Being leap year the period February 25,-March 1, comprises six days.

Hongkong Observatory: The first column exhibits the height of the barometer in inches reduced to Fahrenheit but not to sea level. The cistern is 110 feet above mean sea level. The means have ben derived from the hourly readings except those for the first three months, which are derived from

-diurnal observations, and have been reduced to the mean of twenty-four hours.

The second column exhibits the temperature in degrees Fahrenheit as derived from the hourly alings except those for the first three months, which are derived from observations made in TEVENSON'S screen at 10 a. and 10p.

The third column exhibits the relative humidity derived from the hourly readings except those for the first three months, which are derived from tri-diurnal observations reduced to the mean of twenty-four hours.

The fourth column exhibits the vapour tension in inches derived from the hourly readings except dose for the first three months, which are derived from tri-diurnal observations.

The fifth column exhibits the velocity of the wind in miles per hour derived from the hourly lings except those for the first two months, which are derived from velocities estimated every

x hours.

The sixth column exhibits the percentage of the whole sky, that was covered by clouds, from servations made every six hours.

*

The seventh column exhibits the average daily number of hours in which the sun shone.

The eighth column exhibits the average amount of rain in inches that fell in one day, as derived m the hourly readings.

Victoria Peak: The first column exhibits the height of the barometer in inches reduced to 32° Fahrenheit but not to sea level as derived from tri-diurnal observations. The cistern is 1821 feet

love mean sea level.

The second column exhibits the temperature as derived from observations made at 10 a. and 10p. The third column exhibits the relative humidity from tri-diurnal observations reduced to the an of twenty-four hours.

The fourth column exhibits the vapour tension as derived from tri-diurnal observations.

The fifth column exhibits the force of the wind (0-12) from tri-diurnal observations.

The sixth column exhibits the average amount of rain in inches, that fell in one day as measured 10a.