ii PRIMARY DISSOCIATION-PRODUCTS 27 



these mono-ammo acids have been known for so long a time, and are so 

 readily demonstrated. 



Methods J "or other Substances 



The methods for the estimation of ammonia, cystin, tryptophane, 

 etc., will be discussed when dealing with these substances. 



Enumeration of the Primary Dissociation-Products 



The primary dissociation-products have been arranged according 

 to the following system. [The numbers before the individual com- 

 pounds correspond to those in the text.] 



A. OPEN-CHAIN AMINO-ACIDS. 



I. (a) mono-amino-mono-carboxylic acids. 



1. amino-acetic C 2 H 5 NO. 2 . 



2. amino-propionic C 3 H 7 N0 2 . 

 ammo-butyric C 4 H 9 N0 2 . 



3. amino-valerianic C 5 H n N0 2 . 



4. amino-iso-butyl-acetic C 6 H 13 N0 2 . 



(b) mono-amino-mono-carboxylic-hydroxy acids. 



5. amino-hydroxy-propionic C 3 H r N0 3 . 



6. amino-tetra-hydroxy caproic CgH^NOg. 



(c) mono-amino-di-carboxylic acids. 



7. amino-succinic C 4 H 7 N0 4 . 



8. amino-glutaminic C 5 H 9 N0 4 . 



(d) mono-amino-di-carboxylic hydroxy acids. 



9. amino-hydroxy-succinic C 4 H 7 N0 5 . 



10. amino-hydroxy-suberic C g H 15 N0 5 . 

 II. (e) diamino mono-carboxylic acids. 



11. diamino-propionic C 3 H 8 N0 2 . 



12. diamino-caproic CgH-^N^^ 



13. guanidin-amino-valerianic C 6 H 14 N 4 O 2 . 



14. histidin C 6 H 9 N 3 2 . 

 (/) diamino mono-carboxylic-hydroxy acids. 



15. diamino-trihydroxy-dodecanoic C 12 H 96 N 2 5 . 

 (g) diamino di-carboxylic acids. 



16. diamino-glutaric C^^N^. 



17. diamino-adipic C 6 H 14 N 2 4 . 

 (h) diamino-di-carboxylic-hydroxy acids. 



18. diamino-di-hydroxy-suberic C 8 H 16 N 2 O 6 . 



19. diamino-hydroxy-sebacic C 10 H 20 N 2 5 



20. caseanic acid (?) C 9 H 16 N 2 6 . 



21. caseinic acid (?) C 12 H 16 N 2 5 . 



