41)2 THE BLOOD. 



the constant admixture of air with it, are going on in all 

 parts of the system, and not simply in the lungs. Many 

 comparative analyses between arterial and venous blood have 

 been made. Be'clard has found 



IN THE HORSE. 



Blood of the Blood of the 



Carotid. Jugular Vein. 



Water . . 772-87 783-84 



Albumen and salts 90-62 8872 



Globules . . 132-31 122-94 



Fibrin. . . 4'2 4*5 



Hering, in analyzing the blood of the ox, ascertained as 



follows : 



Arterial Blood. Venous Blood. 



Water. ". . 798'9 794-9 



Fibrin . 7*6 6-6 



Albumen . . 261 25'8 



Globules . . 164-7 170-4 

 Extractive matter 



and salts . . 27 2'3 

 In the dog, Denis found little difference between the blood 

 in the veins and that in the arteries : 



Arterial Blood. Venous Blood. 



Water. . . 830'0 830-0 



Fibrin 2-5 2-4 



Albumen . . 57'0 58-6 



Globules . 99-0 97'0 

 Extractive matter 



and salts. . ll'O 12-0 



In testing the proportion of carbon, nitrogen, hydrogen, 

 and oxygen contained in the albumen, cruor, and fibrin of 

 blood, Michaelis arrived at the following conclusions : 



