Jan., 1903.] Some Climatic Conditions of Ohio. 



345 



Ohio Naturaijst. 



Plate 4. 



f^hPl 





MapW 



MapyH' 



Jennings on" Some Climatic Conditions of ()hio." 



Explanation of Maps. 

 I\Iap W Mean Annual Temperature. 



Lines denote mean temperature for the year rangint^ from 49 to 55 

 degrees Fahrenheit. 



INIap VI. Mean Maximum Temperature. 



Lines pass through points having the same average of maximum tem- 

 peratures. Lines differ from each other by 2 '^ degrees Fahrenheit. 



i\L\p \'n. Mean Minimum Temperature. 



Lines pass through points having the same average of extreme mini- 

 imum temperature. The lines differ from each other by five degrees 

 Fahrenheit. 

 M.\p VIIL Mean Annual Range of Temperature. 



Lines pa.ss through points having the same average range between the 

 extreme minimum and extreme maxinuim temperature of the year. 



