742 



MR ROBERT COCKBURN MOSSMAN ON 



Table XXXI. — continued. 



Thunderstorms. 



The mean daily frequency of Thunderstorms is 2. 



Days. 



Jan. 



Feb. 



Mar. 



April 



May 



June 



July 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



1 



2 



2 



2 



2 







2 



1 



5 







1 



2 



2 



2 



2 



2 



2 



2 







1 



3 



5 







2 



2 



2 



3 



1 



9 



2 



2 







3 



6 



4 



2 



2 



1 



2 



4 



1 



9 



2 



1 







4 



6 



3 



2 



2 



1 



o 



5 



1 



2 



2 



1 





4 



7 



3 



2 



1 



1 



9 



6 



Q 



2 



2 



2 





2 



8 



3 



1 



1 



1 





7 



2 



2 



2 



1 





1 



6 



4 







1 



1 



o 



8 



2 



2 



2 



1 





3 



6 



5 







2 



2 



2 



9 



1 



2 



1 



1 





4 



4 



6 







2 



2 



2 



10 



1 



2 



1 



1 





5 



6 



6 







2 



2 



9 



11 



1 



2 



1 



1 







4 



6 



6 







2 



2 



2 



12 



2 



2 



2 



1 







3 



5 



7 



1 



2 



2 



9 



13 



2 



2 



2 



1 



2 



2 



3 



5 



1 



2 



2 



1 



14 



9 

 aj 



2 



2 



2 



4 



3 



5 



3 



1 



2 



2 



1 



15 



1 



1 



1 



2 



4 



3 



6 



2 



1 



2 



2 



1 



1G 



1 



1 



1 



2 



3 



4 



6 



1 



1 



2 



2 



2 



17 



1 



1 



1 



2 



2 



4 



4 



2 







1 



2 



2 



18 



1 



1 



9 



2 



3 



4 



5 



1 







1 



9 



9 



At 



19 



1 



2 



1 



2 



2 



4 



6 



3 







1 



2 



o 



20 



1 



9 



1 



2 



2 



4 



7 



1 



1 



1 



9 



2 



21 



1 



9 



At 



1 



9 



1 



4 



6 



1 



1 



1 



2 



2 



22 



2 



2 



2 



1 





5 



5 



1 



1 



2 



2 



2 



23 



2 



2 



2 









4 



6 







1 



2 



2 



2 



24 



2 



1 



2 









5 



5 



2 



2 



2 



2 



2 



25 



2 



1 



2 









5 



5 



2 



2 



1 



9 



2 



26 



2 



1 



2 









5 



4 



1 







1 



2 



2 



27 



2 



2 



2 









4 



6 







1 



1 



2 



2 



28 



2 



1 



2 









3 



7 







1 



1 



2 



2 



29 



1 





2 









3 



6 











1 



2 



1 



30 



1 





2 











2 



5 











1 



o 



2 



31 









2 





... 



... 



4 









... 





2 



Note. — The heavy type indicates an excess, and the italic type a defect. 



