BLOOD, MILK, URINE. 1051 



the globulin of blood. They are soluble in acetic acid with 

 the exception of an exceedingly minute nucleus. The serum of 

 pus contains albumen and another substance in larger quantity, 

 to which the name pyin is applied, of which the solution in 

 water is precipitated by alcohol, tannin, acetic acid, and most 

 completely by alum, but not by ferrocyanide of potassium ; the 

 precipitates are insoluble in an excess of the reagents. 



From mucus pus is distinguished by its different external 

 characters, by the different form and smaller size of its 

 microscopic corpuscles, by its different relations to water, and 

 particularly by its becoming with caustic alkali, thick slimy and 

 gelatinous, and in acetic acid assuming the appearance of an 

 emulsion, while mucus becomes thinner with an alkali, and 

 with acetic acid coagulates as a flocky matter which unites 

 into a thready mass. 



SECTION VI. 



BLOOD, MILK, URINE. 



Blood. The constitution of the blood has already been de- 

 scribed under the principal constituents of the clot, fibrin, hema- 

 tosin and globulin, and albumen the chief constituent of the 

 liquid portion. It is always alkaline from a salt of soda, proba- 

 bly the carbonate. 



The following table exhibits the results of two careful ana- 

 lyses of human blood by M. Lecanu. (Ann. de Chim. &c. 

 xlviii. 308.) 



Human blood. 



Water. . ... 780.145 785.590 

 Fibrin. . ... 2.100 3.565 

 Colouring matter (hematosin and globulin). 133.000 119.626 

 Albumen. . ... 65.090 69.415 

 Crystalline fatty matter. . . . 2.430 4.300 

 Oily matter. . ... 1.310 2.2/0 

 Extractive blatter soluble in water and alco- 

 hol. . ... 1.790 1.920 

 Albumen combined with soda. 1.265 2,010 



