A CONTRIBUTION TO THE KNOWLEDGE OF ARGINTN. 1 7 



ANALYTICAL DATA. 

 I. Cryptomeria japonica. 



(a). Boiled with 20,%" hydrochloric acid for 30 hours. 



50 grams air dry = 36.50 g. dry crude proteids ( = 1.582 g N) 

 were boiled with hydrochloric acid. The extract was diluted to 

 400 c.c. from which the following determinations were made : — 



Solutions 

 used. 



Baryta 

 water 

 replaced. 



Nitrogen 

 found. 



Absolute 

 quantity 

 in total 

 solution. 



Ratio. 



Total nitrogen 



c.c. 

 10 



Nitrogen in copper hydrate 

 precipitate 



Nitrogen directly precipitated 

 by phospho-tungstic acid.. 



Nitrogen in phospho-tungstic 

 precipitate in the filtrate of 

 copper hydrate 



Nitrogen in ammonia 



Nitrogen in organic bases. 



20.6 

 20.8 

 i-3 



1- 5 

 74 

 74 

 5-6 

 6.0 



2 - 5 

 2.7 



0.0387 



0.0026 



0.0138 



"b.oioS 



- 0.0048 



I-S48 



0.104 



o-55i 



0.432 



0.194 



0.238 



100.0 



6.7 

 35-6 

 28.0 

 12.5 

 '55 



1 c.c. baryta water = 0.00 1 86 g. N. 



