LECTURE X. 



Also by those of Boussingault of the starchy seeds and of the seed- 

 lings of the Maize ; the seedlings had grown in dark for 20 days. 



a. Absolute weights, in grammes : 



b. Weights calculated in percentages : 



The foregoing statements as to the changes which the 

 reserve-materials of the seed undergo at the time of germi- 

 nation apply to other depositories of reserve-materials as 

 well. As regards the non-nitrogenous material stored up in 

 bulbs, tubers, rhizomes, roots, etc., we have seen that it is 

 deposited in the form of carbohydrates, such as starch, inulin, 

 cane-sugar, and glucose. Of these, starch, inulin, and pro- 

 bably also cane-sugar, are converted into grape-sugar (glu- 

 cose) on germination, and are supplied in that form to the 

 growing shoot. As to the nitrogenous organic substance 

 stored in these depositories, it is, as we have seen, accumu- 

 lated in the form of amides for the most part, and can 



