LEMNA. 



[CH. Ill 



the Lemna died in a short time in distilled water; 

 whether this is due simply to starvation or to some other 

 cause we have not ascertained. 



K w 



FIG. 11. Exp. 77. (Life-size.) 



Fig. 12 gives the comparative result of culture in 

 Sachs' fluid (S) and in the same without phosphates 



