SOIL HEAT 



303 



: NATURES OF DiFFERENT-COLORED SOILS AT A DEPTH OF 

 . TAKEN' Jl.VE 23, 1876, AT MUNICH (iN DEGREES 



. i'KiUADE) 



WV/TE 



J 



FIG. 47. Curves showing the temperature variation of different-colored 

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

 June 23, 1876. 



