SOIL HEAT 



303 



Temperatures of Different-colored Soils at a Depth of 

 4 inches, taken june 23, 1876, at munich (in degrees 



Centigrade) 



/OT/A7E 



Fig. 47. — Curves showing the temperature variation of different-colored 

 soils at a four inch depth compared with air temperature. Munich, 

 June 23, 1876. 



