BOTANY OF LA SALLE COUNTY. 15 



Temperature at, or near, sunrise, at Ottawa and at 

 B v arm Ridg-e: 



Day. January. February. March. April. 



*>-The first column for each month gives the temper- 

 ature at Farm Ridg-e at, or near, sunrise; the second, 

 that at Ottawa, at 7:00 A. M. The difference in ele- 

 vation of the two stations is not less -than 200 feet. 

 The distance in an air line is about nine and one-half 

 miles S. S. W. from Ottawa. 



Rain Fall. The total rainfall for the year 1894 

 was 27.70 inches, for 1893 it was 31.04, while during- 

 1887 it was 29.7, for 1878 it was 18.73 only, As a 

 rule the latter part of winter and the spring- are wet, 

 the summer and fall dry. There is usually an abun- 

 dance of rain until the last of May of middle or June, 



