THE BLOOD. 



and other bodies, chiefly albumin (96$), and a coloring matter, 

 hcsmocJiromogen (4$), containing iron, which in the presence of 

 oxygen is easily oxidized into hcematin. 



The haemoglobin prepared from different kinds of blood has 

 not exactly the same constitution, which seems to indicate the pres- 

 ence of different haemoglobins. The analyses of different investi- 

 gators of the haemoglobin from the same kind of blood do not 

 always agree with one another, which probably depends upon the 

 somewhat various methods of preparation. The following analyses 

 are given as examples of the constitution of different haemoglobins : 



Haemoglobin 

 from the 



Dog 53.85 



54.57 

 54.87 

 51.15 

 54.66 

 54.17 

 54.71 

 Guinea-pig 54.12 

 Squirrel... 54.09 



-Goose 54.26 



Heu 52.47 



Horse 



Ox.., 

 Pig 



(HOPPE-SEYLER.) 

 (JAQUET.) 



. (KoSSEL.) 

 (ZlNOFFSKY.) 

 (HfJFNER.) 

 (OTTO.) 

 (HtJFNER.) 

 (HOPPE-SEYLER. ) 



197 (JACQUET.) 



The question whether the amount of phosphorus in the haemo- 

 globin from birds exists as a contamination or as a constituent has 

 not been decided. In the haemoglobin from the horse (ZINOFFSKY), 

 the pig, and the ox (HuF^ER) we have 1 atom of iron to 2 atoms of 

 sulphur, while in the haemoglobin from the dog (JACQUET) the rela- 

 tion is 1 to 3. From the data of the elementary analysis, as also from 

 the amount of loosely-combined oxygen, HUF^ER has calculated 

 the molecular weight of dog-haemoglobin as 14,129 and the formula 

 C M8 H 109B N 1M FeS a 181 . The molecular weight is therefore very high. 

 The haemoglobin from various kinds of blood not only show a 

 diverse constitution, but also a different solubility and crystalline 

 form, and a varying quantity of water of crystallization, from which 

 we infer that there are several kinds of haemoglobin. 



Oxyhsemoglobin, which has also been called H^MATOGLOBULIN 

 or H^EMATOCRYSTALLIN, is a molecular combination of haemoglobin 

 and oxygen. For each molecule of haemoglobin 1 molecule of oxy- 

 gen exists; and the amount of loosely-combined oxygen which is 

 united to 1 grm. oxyhaemoglobin (of the dog) has been determined by 



