April, 1903.] Some Climatic Conditions of Ohio. 
409 
Ohio Naturalist. 
Plate 12. 
MapM 
Jennings on “Some Climatic Conditions of Ohio." 
EXPLANATION 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. More heavily shaded por- 
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 unshaded portion, less than 70 
per cent. 
