ANIMAL AMIDES. 



lution is precipitated by prussiate of potash, but the muriate of 

 chondrin is not Muriatic acid precipitates casein, but dissolves 

 chondrin, and only occasions a precipitate when added in very 

 minute quantity. 



9. Chondrin like collin is precipitated by tannin, chlorine, al- 

 cohol and corrosive sublimate. 



Chondrin was subjected to an ultimate analysis by Vogel. 

 He states the constituents to be, 



Carbon, . 48-97 



Hydrogen, . 6-53 



Azote, . 14*55 



Sulphur, . 0-32 



Oxygen, . 29-63 



100-00 



As we have no data to determine the atomic weight of chondrin, 

 we cannot state from this analysis the number of atoms which it 

 contains. Supposing the sulphur accidental, and the azote to be 

 three atoms, the composition would be C 24 H 19 Az 3 O 11 . Hence 

 we see how much less azote it contains than collin. 



The analysis of Mulder approaches pretty near to that of 

 Vogel.* He obtained, 



Carbon, . 49-96 



Hydrogen, . 6-63 



Azote, . 14-44 



Sulphur, . 0-38 



Oxygen, . 28-59 



100-00 



He represents the constitution by the formula, C 320 H 260 Az 40 S 

 O 140 or 10 (C 32 H 26 Az 4 O 14 ) + S. 



Dr Schererf analyzed chondrin from the cartilages of the 

 ribs. He obtained, 



Carbon, . 50-195 

 Hydrogen, . 7-047 

 Azote, . 14.908 

 Oxygen, . 27-850 



100-000 



* Ann. der Pharm. xxviii. 328. f Ann. der Pharm. xl. 49. 



