164 MR. J. CURTIS ON THE FALL OF RAIN AT 
year, and that the fall of rain in the first 6 months of the 
year is to that of the last 6 months as 2 to 8— that there 
is less difference between the two periods in the later 
returns than in the earlier ones; for Mr. Walker’s returns 
show a proportion of 16 to 26, Dr. Dalton’s of 14 to 21, 
Mr. Casartelli’s of 15-1 to 21:24, and my own of 13:2 to 
17°6. Whether this progressive diminution of difference 
between the first and the last half of the year is owing to 
the later returns being for shorter periods than the former 
ones, or to some change in the fall of rain influenced by a 
change of circumstances, future returns will show. 
The following table shows the greatest and least amount 
of rain which has fallen in every month during the 72 
years, with the year in which it fell, and the name of the 
collector. 
| Year. | Inches. || Year. ae 
| 
January. 1806 | 5°851 | Dalton. Ant 0320 | Dalton. 
February 1848 | 6565 | Casartelli. | 1800 | 0-440 | Dalton. 
March.. 1827  6:030 | Dalton. 0-180 | Dalton. 
| 
April... | 1791 | 4°750 | Walker. | 1842 | 0-160 | Casartelli. 
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May ... | 1792 | 8000 | Walker. || 1844 | 0-090 | Casartelli. 
June ... | 1830 | 7°055 | Dalton. 1826 | 0-200 | Dalton. 
July ... | 1828 11480 | Dalton. 1800 0-290 | Dalton. 
August .| 1799 | 8740 | Dalton. 1801 0-730 | Dalton. 
September) 1792 | 9°000 | Walker. | 0:240 | Dalton. 
October . | 1787 | 9:000 | Walker. 1817 | 0-604 | Dalton. 
November, 1825 | 7°375 | Dalton. || 1805 | 0-624 | Dalton. 
December | 1792 
9°500 | Walker. 0-070 | Casartelli. 
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The largest amount of rain fell in 1792, and was 55°250 
inches; the least amount of rain fell in 1826, and was 
24-910 inches. 
The rain which fell from 1793 to 1814 was below the 
average of the 64 years; from 1815 to 1852 it was above ; 
and from 1853 to the present time it has again fallen be- 
low, leading to the inference that we have entered into a 
low series, and that, consequently, we may for some time 
expect the rain fall to remain below the average, though 
