April, 1903.] Some Climatic Conditions of Ohio. 



409 



Ohio Naturai^ist 



Map IX 



^ MapXL ^'^^ 



Jennings on "Some Climatic Conditions of Ohio." 



EXPIvANATlON OF MAPS. 



Map IX. Wind Direction. Arrows denote prevailing direction of wind. 



Map X. Normal Relative Humidity for January. Shaded portion, has a 

 relative humidity of above 80 per cent. ; the unshaded portion, below 80 

 per cent. 



Map XI. Normal Relative Humidity for July. I\Iore heavily shadedjpor- 

 tion represents regions having a relative humidity of above 70 per cent. ; 

 the less heavily shaded, between 65 and 70 per cent., and the unshaded, 

 below 65 per cent. 



Map XII. Normal Annual Relative Humidity. More heavily shaded por- 

 tion denotes a relative humidity of 75 per cent, or above ; less heavily 

 shaded portion, 70 to 75 percent., and luishaded portion, less than 70 

 per cent. 



