PROTEIN. 177 



trate of silver, chloride of iron, acetate of copper, are precipitat- 

 ed by it. 



Mulder subjected this last precipitate to an analysis. 110 

 parts dried at 248 gave 4 of oxide of copper. 418 parts gave 

 752 carbonic acid, and 243 water. The azote amounted to 

 14 '8 7 per cent Hence the constituents are, 



Carbon, . 49-06 



Hydrogen, . 6-46 



Azote, . 14-87 



Oxygen, . 25-97 



Oxide of copper, 3-64 



100- 



He represents the constitution by the formula C 80 H 63 Az 10 

 O 31 + CuO. He considers it as a compound of 1 atom oxy- 

 protein, and 1 atom oxide of copper, together with a compound 

 of one atom oxy-protein, and 1 atom water. 



1 atom oxy-proteate of copper, C 40 H 31 Nz 5 O 15 -f CuO 

 1 atom oxy-protein -f Aq, C 40 H 31 Az 5 O 15 + HO 



C 80 H 62 Az 10 O 30 + HO 



Chloroxy-proteates. Chloro-proteic acid, when dissolved in 

 barytes water, and a current of carbonic acid passed through the 

 solution to throw down the excess of barytes, and finally, when 

 filtered, gives a barytes salt, the constituents of which are con- 

 stant Alcohol being added to the aqueous solution, the new 

 salt is precipitated while the chloride of barium remains in solu- 

 tion. The new salt was washed with boiling alcohol and dried 

 at 266. 



When acetate of copper is dropt into the aqueous solution of 

 the barytes salt, as we have it before precipitation by alcohol, 

 bluish flocks precipitate. This precipitate was thoroughly wash- 

 ed and dried at 266*. 



With chloride of iron a third salt was obtained. But the an- 

 alysis of it was found difficult 



The barytes salt being subjected to analysis was found com- 

 posed of, 



