94 



PROCEEDINGS OF THE CANADIAN INSTITUTE. 



II. Table showing dates of fii-st and last frosts from 1871 to 188S 

 inclusive. 



Year. 



Last frost iu 

 Spring. 



First frost in 

 Autumn. 



No. of days free 

 from frost. 



1S71 



April 23 



Nov. 12 



202 



1872 



" 2 



Oct. 11 



192 



187.3 



" 26 



" 21 



178 



1874 



" 30 



" 14 



167 



1875 



" 19 



" 12 



176 



1876 



" 6 



" 7 



184 



1877 



May 1 



" 5 



157 



1878 



Mar. 26 



" 13 



201 



1879 



April 18 



" 24 



189 



1880 



" 12 



" 18 



189 



1881 



" 14 



" 20 



189 



1882 



May 16 



" 24 



161 



188.3 



" 24 



Nov. 1 



160 



1884 



April 25 



Oct. 16 



174 



1885 



May 10 



" 22 



165 



1886 



" 1 



2 



154 



1887 



April 19 



Sept. 24 



158 



1888 



'• 21 



" 24 





Average . . . 



April 24 



Oct. IS 



176 



The processes of erosion are aflFected directly by the amount of rain- 

 fall, and by its distribution throughout the year. A regular and uni 

 form precipitation favoi-s erosion in both its divisions of weathering 



