Page:The climate of Western Australia, from meteorological observations made during the years 1876-1899.djvu/157



The State has been divided into "degree squares," and in each of these:—

1. The figure shows the mean rainfall for that square, obtained from the records of all stations situated therein, and for as many years as the records cover.

2. The circle represents this graphically, according to the attached scale.

3. The name is that of one of the stations situated within the square, inserted for reference purposes.

4. The black dot indicates the exact position of this particular station.

5. A+ signifies that no rain has ever been recorded at any station within the square for the month.

The rainfall is always recorded in "points," 100 points = 1 inch. No means are taken where the records do not extend over at least five years.