Quantity of Rain. cix 



234. Annual Variation of the Fall of Rain. — From the means for 18 years at the foot of Table 101, the 

 greatest amount of rain fell in October, and the least fell in April, the daily average for the latter month being 

 rather less than half that for the former. The amounts of rain for the months of June, July, August, Septem- 

 ber, and October, differ little, the average daily fall for these 5 months being 0-0894 inch. The daily means for 

 the quarterly groups with the greatest range of values are as follow : — 



in. in. 



Winter, Nov., Dec, Jan., =0-0673 Summer, June, July, Aug., = 00788 



Spring, March, April, May, =0-0519 Autumn, Sept., Oct., Nov., =0-0902 



in. 



Year, =0-0722 



235. Amount of Rain with reference to the Moon\s Age. — This discussion was given in the volume for 

 1844, p. 447. The result, as obtained from 6 years' observations of the Observatory gauge, may be stated 

 shortly thus : — 



The average daily fall of rain during the second and third quarters = 00654 inch. 

 fourth and first =0-0750 inch. 



So that a greater amount of rain fell about new than about full moon. (See Foot-note to No. 227.) 



