~ 155 - 



The rate of evaporation diminished fairly uniform- 

 ly till the hygroscopic moisture was reached. The "drought 

 limit" for corn appears to have been reached before the 

 first weighing was made at the end of/three days. The 

 data would have been more valuable had the weighings been 

 made at closer intervals , 



RATE OP DRAINAGE AND EVAPORATION PROM CYLINDERS OF 



SOIL 



The cylinders of soil taken November Slat. (Table 

 "C") for the determination of pore space were used. Im- 

 mediately beneath the soil was cheese cloth, the whole 

 being supported by galvanized wire netting one sixth inch 

 mesh. The cylinders with accessories were supported on 

 sticks in pans, allowing a frew access of air beneath. 

 Covers of glazed paper and boards were used, thus prac- 

 tically eliminating the loss of moisture to the bottom 

 of the cylinders . 



They were placed in the room used for evaporation 

 from platinum dishes under what appeared to be uniform 

 conditions. The resulibs follow in Tables P, G, & H: 



