238 



CIRCULATING FLUIDS : 



The two following analyses, one of the venous blood of the 

 mother, the other of the placental blood as it issued from the 

 artery of the cord, may serve as an additional illustration of 

 the point. 



The blood of the umbilical artery was of a brown-red colour, 

 smelled of the liquor amnii, and became of a brighter coloiu" on 

 being exposed to the air. 



Water 



Solid residue . 



Fibrin 



Albumen 



Blood -corpuscles 



Peroxide of iron 



Phosphorized fat 



Ozmazome and cruorin 



Salts 



The difference in the solid constituents and in the blood- 

 corpuscles is obviously very considerable; the same is the case 

 with the iron, the ratio being 1 to 2*5. 



The mass of the blood in the foetus increases in a very rapid 

 ratio with the development. The proportion of corpuscles is 

 more augmented, and the quantity of water is less than occurs 

 at any subsequent period of life. Even for some time after 

 birth the mass of the blood is relatively large, and the propor- 

 tion of blood-corpuscles and of iron contained in them is con- 

 siderably above the ordinary standard, 



Denis has made some experiments on the difference between 

 the blood of very yoimg animals and those of mature age, 

 which confirm the observations already made. His experi- 

 ments were instituted on dogs. 



When the skin of the new-born animal loses its red tint, 

 the blood becomes more watery, the blood-corpuscles and the 

 quantity of iron are diminished, and it becomes relatively, but 



