50 



COLONSAY 



as we ascend, an appreciable reduction of temperature, marked 

 in the loftier of the islands by the occurrence of certain species 

 of plants that are rarely, or never, found growing at low levels. 



Rainfall. According to Dr Hugh Eobert Mill, Director 

 of the "British Rainfall," the yearly rainfall of Colonsay 

 may be taken as varying from 40 to 50 inches, distributed 

 throughout the months of the year, on an average, as 

 follows : January 5 inches, February 4 inches, March 



3 inches, April 2 inches, May 2 inches, June 3 inches, July 



4 inches, August 4 inches, September 5 inches, October 



5 inches, November 5 inches, December 5 inches. 



MEAN MONTHLY AND ANNUAL RAINFALL OF THREE INSULAR 

 STATIONS SURROUNDING COLONSAY : calculated on a mean of 

 15 years 1876 to 1890 for Gruinart and Fladda, and on a mean 

 of 9 years 1866 to 1874 for Hynish, Tiree. 



