ON WHICH RAIN FALLS ANNUALLY AT LONDON. 



335 



annually during this long period is 155*4 days ; the monthly 

 means are as follows : — 



r 



January . . . 

 February . 

 March . . . 



►ays on which 

 Rain fell. 



134 



12-4 



ir9 



April . . . 

 May . . . 

 June 



127 

 127 



I2'0 



July . . . 

 August . . . . 



13-0 

 12*9 



September . . 

 October . , . 

 November . 



. 127 



14-4 

 13-6 



December . 



13-6 



Year . . 



. i'5'5-4 



The maximum appears to occur in October,, the wettest 

 month, and the minimum in March. The quarterly values 

 are. 



Winter — Dec, Jan., and Feb. . . 

 Spring— March, April, and May . 

 Summer — June, July, and August 

 Autumn — Sept., Oct., and Nov. . 



Days. 



39'4 

 37*3 



37*9 



407 



The maximum here occurs in autumn, and the minimum 

 in spring. 



Finding the means for periods of 5 years, we have 



1st period 1807-18 12 

 2nd do. 1813-1817 

 3rd do. 1818-1822 

 4th do. 1823-1827 

 5th do. 1828-1832 





Days. 



I68-I 





191-8 





173-2 

 i68-2 





. 154-8 



