ANIMAL AMIDES. 



separated. The hematosin acquired a dark-green colour. He 



obtained a compound of 



Hematosin, . 66-19 or 8-78 

 Chlorine, 33-87 or 4-5 



100-00 



Now, if we suppose with Mulder that six atoms of chlorine 

 have combined with one atom of hematosin, the atomic weight 

 of this last substance must be 52-68, which approaches, though 

 not very nearly, to 49-625, the weight deduced from Mulder's 

 analysis. 



Mulder has again repeated this analysis, and now considers 

 hematosin to be composed of C 44 H 23 Az 3 O 6 Fe - 50-5.* 



The compound of chlorine and hematosin is deep-green. It 

 dissolves in alcohol, communicating to that liquid the colour of 

 bile. Neither acids nor alkalies alter the colour of this solution. 

 But when boiled with potash, it becomes straw-yellow. When 

 heated with sulphohydrate of ammonia, the alcoholic solution be- 

 comes red. 



Mulder did not succeed in combining iodine in definite quan- 

 tity with hematosin. When the compound was heated to 302, 

 a temperature necessary to drive off the excess of iodine, the 

 whole of that substance escaped ; however, the hematosin was 

 altered, for it was insoluble in alcohol, mixed with ammonia or 

 with sulphuric acid. 



When phosphorus or sulphate of iron is boiled with a solution 

 of hematosin, the colour is not altered. Boiling hot sulphuric 

 acid becomes coloured when mixed with hematosin ; but the 

 greatest part of this last substance remains undissolved ; yet its 

 nature is altered, for it is no longer dissolved when alcohol is 

 added. When sulphurous acid gas is passed through a solution 

 of hematosin in alcohol, acidulated with sulphuric acid, the co- 

 lour is not altered ; but when the solvent is ammoniated alcohol, 

 the colour becomes light-red. 



When hematosin, dried at 266, is put into dry muriatic acid 

 gas it assumes a violet red colour. The muriate formed dis- 

 solves in alcohol, and the liquid assumes a fine red colour. It 

 reacts as an acid. Mulder found that 100 parts of hematosin 

 absorbed 12-97 of muriatic acid. But when the compound was 



* Ann. der Pharm. xxxi. 134, and xxxvi. 79. 



