i66 



EXPOSED WATER AND FRESHLY FALLEN RAIN 



in it up to an ink mark, placed lo mm. from the root-tip. Observa- 

 tions of the length of the hypocotyls were recorded as follows : 



120 



Day of', 



ith 



Fig. 36. Lupinus albiis. Duration of exposure of the Water, 24 Hours. 

 Control; , 1,500,000 X; > 1,800,000 X- 



