464 



M 1\ "AC I II. 



II. Then chinensis (b) U) 

 Total nitrogen in fresh leaves. 



a). 0.9435 g. of dry matter contained O.0242983 g. of nitrogen 

 ( = 14.2 c. c. baryta water (2> ) = 2.575 %• b). 0.9435 g. of dry 

 matter contained 0.0242983 g. ( = 14.2 c. c. baryta water) 

 = 2-575 % ; average 2.575 % nitrogen. 



Protein nitrogen in fresh leaves. 



a). 0.9435 g. of dry matter contained 0.0203627 g. of nitrogen 

 ( = 11.9 c. c. baryta water) = 2. 158 %• b). 0.9435 g. of dry mat- 

 ter contained 0.020191570 g. ( = 11.8 c. c. baryta water) = 2. 140%- 

 average 2.149%. °f protein nitrogen. 



Theine nitrogen in fresh leaves. 



a). 4.7175 g. of dry matter yielded O.045 g. theine 

 ( = 0.0130412 g. theine nitrogen ( = 0.276% nitrogen, b). 4.7175 g. 

 of dry matter yielded 0.049 g. theine ( = 0.0141958 g. nitrogen) 

 =0.30l 0 /o ; average 0.288% theine nitrogen. 



Total nitrogen in starved leaves. 



a.) 0.8951 g. of dry matter contained 0.0285762 g. of nitrogen 

 (=16. c.c. baryta water) = 3. 192 %. b). 0.8951 g. of dry mat- 

 ter contained 0.0284906 g. (=16.65 c - c - baryta water) = 3. 183 % ; 

 average 3.187 %• 



Protein nitrogen in starved leaves. 



a). O.8951 g. of dry matter contained 0.01942 16 g. of nitrogen 

 (=11.35 c.c. baryta water) =2.169 % nitrogen. b). 0.8951 g. 

 of dry matter contained O.O195927 g. (=11.45 c - c - baryta water) 

 = 2.189% ; average 2.179%. 



Theine nitrogen in starved leaves. 



a). 44755 g. of dry matter yielded 0.0635 g. theine 

 ( = 0.019195 g. theine nitrogen) = 0.428 % theine nitrogen, b). 

 4.4755 g. of dry matter yielded 0.0695 g. theine (=0.0200618 g. 

 theine nitrogen) = 0.448 % theine nitrogen ; average 0.438 %• 



(1) These old leaves were collected in May 1896. 



(2) 10 c. cm. of the standard sulphuric acid corresponded to 21.6 c. cm. of the stand- 

 ard baryta water and i.e. cm. of the baryta water corresponded to 0.00171 115 g. of 

 nitrogen. 



