356 KiRKWOOD AND GiES : Chemical Studies 



ing weights of the fresh parts were very carefully taken ; the data 

 for nitrogen were determined by the Kjeldahl method.* 



Percentage of Percentage 



Total Weight. of Nitrogen. 



28.1 



22.2 



230 

 2-3 



5-9 



0.14 

 0.31 



0.65 

 0.93 



0.70 



0-53 



0.27 



0.54 



8.3 0.29 



0.39 



10.2 0.45 



73-4 

 26.6 



50.3 



The tables on pages 354-355 give all our results for general 

 composition of the parts of the germinated nut.f Numerous 

 deductions may be drawn from these rc-^ults, as to growth and 

 metabolism. 



The central part of the cotyledon, with its vascular network, 

 contains more water and less solid matter than any other part of 

 the germinated nut. The proportion of solid substance in it in- 

 creases toward the corrugated epithelium, being greatest in the 

 "neck," where the structure is fibrous and woody. 



That the absorbing organ completely takes up the milk is very 

 evident from the way it fills the cavity and from its own composition, 

 but it is likewise apparent from our results that water is also with- 



* The husk was not weighed because it was decayed underneath and water-logged. 

 Nitrogen was not determined in the shell because its substance remains unaltered dur- 

 ing germination. 



t The methods of determination were the same as those used previously. The 

 roots, outside of the husk, which had been in the wet soil, were hurriedly rinsed with 

 water to remove inorganic matter then wiped dry with a towel and at once cut into 

 thin cross sections for analysis. 



