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of control plants grown at the same time. The behavior 

 of the second plant was also normal during the period of 

 experiment with it. Tae water-intake of both plants 

 was comparable in all ways with that of the controls, 

 further experiments are in progress with this species, 

 but present evidence seems sufficient to show that tl£ 

 roots remained uninjured by a removal of oxygen which 

 must have been very nearly complete if not quite so. 



