last killing frost in spring occurs on an average six 

 days later than at Sandusky and the first killing frost 

 in autumn five days earlier. 



CLIMATE OF THREE CITIES 



ON J.AKB ERIE AND ONE A HUNDRED MILES SOUTH OF 



IT FROM TIME OF ESTABLISHMENT OF WEATHER 



BUREAU IN EACH PLACE TO END OF 1897. 



Lowest Minimum. 

 Highest Maximum 



Av. date last kill-\ 

 ing frost in spring/ 

 Av. date 1st kill-\ 



ing frost in fall./ 

 Av. rainfall in\ 



inches J 



Av. relative hu-\ 



midity / 



-16 

 100 



April 14. 



Oct. 23. 

 34.69 

 72.07 



-17 

 99 



May 1. 



Oct. 11. 

 34.82 

 72.0 



-14 

 95 



May 20. 



Oct. 5. 

 39.66 

 74.5 



-20.3 

 103 



April 20. 



Oct. 18. 

 38.74 

 71.4 



GEOLOGY. 



The physical feature of Erie county which causes 

 most difference between its flora and that of the 

 counties to the east is the existence of prairies in its 

 southern and western part. These prairies are of two 



