56 
By taking the means of the numbers in each month for all the years, 
the average fall of rain for each month is as follows :— 
At 
January 
Chiswick. 
In. 
1-70 
At Greenwich. 
In. 
1-87 
February 
1-45 
1-57 
March 
1-37 
1-59 
April 
1*51 
1-73 
May 
1*96 
2-17 
June 
1-99 
1-94 
July 
2*32 
2*56 
August 
2-41 
2-39 
September 
2-50 
2-43 
October 
2*63 
2-77 
November 
2-10 
2*36 
December 
1*53 
1-96 
Greenwich averages are for fifty-five years, viz. 1815-1869. 
The following Table shows the yearly fall of rain in each year in 
the period 1826—1869 at Chiswick and at Greenwich for the same 
years 
Year. 
1826 
Chiswick. 
In. 
21-8 
Greenwich. 
In. 
23-0 
1827 _ 
22-4 
24-9 
1828 
27-9 
31-5 
1829 
26-1 
25-2 
1880 
24-3 
27*2 
1831 
26-9 
30-8 
1832 
21-6 
19-3 
1833 
25*8 
23-0 
1834 
20-4 
19-6 
1835 
. ‘ 23-2 
24-9 
1836 
28-7 
27-1 
1837 
19-9 
21-0 
1838 
21-6 
23-8 
1839 
27-9 
29-6 
1840 
18-9 
18-3 
1841 
31-0 
33-3 
1842 
22-3 
22-6 
1843 
25’5 
24-6 
1844 
21-3 
24-9 
1845 
23-3 
22-4 
1846 
27*7 
25-3 
1847 
16-7 
17-8 
1848 
28-8 
.30-2 
1849 
22-8 
23*7 
1850 
18-3 
197 
1851 
20-8 
22-7 
1852 
32-6 
34-2 
