64 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Weight of fresh material .201 gram. 



" " dried " .049 " 



" " ash " .002 " 



Proportion of water in fresh material 75 '3 P^^ cent. 



" " dried matter 24.7 " 



X 



Determination of the composition of seeds ; 



Weight of 25 air-dried seeds .851 gram. 



" " dried material .762 " 



" " ash .016 " 



Proportion of water 10.46 per cent. 



" " dried matter 89.54 " 



" " ash in fresh material 1.88 " 



" " " dried " 2.09 " 



It is to be seen by a consideration of the above data that the 

 resting corm of a plant, which has been etiolated once, contains a 

 greater proportion of water and less dried material than the normal, 

 a relation that holds during the second etiolation also. The propor- 

 tion of ash in the fresh material in etiolated corms was found to be 

 less than in the normal, while the proportion of ash to the other con- 

 stituents of the dried matter increased by reason of the actual 

 decrease of the latter. The proportion of water in etiolated leaves 

 was greater than the normal, and the proportion of ash in the fresh 

 material less, in the corm. Likewise the proportion of ash to the 

 other constituents of the dried matter was very much greater than in 

 the normal. 



