64 



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. 



Fig. 11. Exp. 77. 

 Fig. 12 gives the comparative result of culture in 

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



