A CONTRIBUTION TO THE KNOWLEDGE OF ARGININ. 19 



II. Gingko biloba. 



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



18.775 S- a ' r dry = 15.045 g. dry crude proteids ( = 2.2718 g. N) 

 were boiled with 20% hydrochloric acid. The extract diluted 

 to 400 c.c. 



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-tungtic acid ... 



Nitrogen in phospho-tungstic 

 precipitate in the filtrate of 

 copper hydrate 



Nitrogen in ammonia 



Nitrogen in organic bases 



30-4 

 29.8 



o-5 

 0.5 



1 1.2 

 IO.8 

 IO.I 



10.3 

 2.9 



I 0.0560 



i 



I" 0.0009 



t 



1" 0.020s 



i 



j 0.0 1 90 



I" 0.0056 



I - 



2.2396 



00372 

 0.8184 



0.7588 



0.2236 

 0.5356 



100.0 



i-7 

 36.5 



33-9 

 1 0.0 



23-9 



I c.c. baryta water = 0.00186 g. N. 



(b). Boiled with 0.5% hydrochloric acid for 146 hours. 



10.143 g. air dry = 8.i28 g. dry crude proteids (= 1.229 g. N) 

 were boiled with 0.5% hydrochloric acid. The extract diluted 

 to 400 c.c. 



Solutions 

 used. 



Baryta 

 water 

 replaced. 



Nitrogen 

 found. 



Absolute 

 quantity 

 in total 

 solution. 



Ratio. 



Total nitrogen 



c.c. 



16.5 









1 



16.5 



[ 0.0307 



1.2276 



100.0 



Nitrogen in copper hydrate 





°-5 









precipitate 



\ : 



0.5 



|- 0.0009 



0.0372 



3-o 



Nitrogen directly precipitated 



J » 



5.8 



\ 0.0110 



043 8 3 



35-7 



by phospho-tungstic acid... 



1 



6.0 





Nitrogen in phospho-tungstic 



i " 



5-3 



I 







precipitate in the filtrate cf 



1 „ 





r 0.0100 



0.4000 



32-9 



copper hydrate 





5-4 

 1.8 







Nitrogen in ammonia 



I i 



»7 



| 0.0032 



0.1265 



10.3 



Nitrogen in organic bases ... 







! 



1 - 



0.2735 



22.6 



