BLOOD. 197 



solid residue than venous blood. In the bullock and sheep 

 the fibrin in arterial exceeds that in venous blood ; in the horse 

 the reverse is observed. The same observation holds good with 

 regard to the albumen, and in this respect (at least in the case 

 of bullocks^ and sheep's blood) Hering's results differ from those 

 of Denis and myself. 



Hering invariably found the quantity of blood- corpuscles to 

 be greater in venous than in arterial blood ; the proportion of 

 extractive matters and salts are, however, extremely fluctuating. 



Lecanu' has likewise analysed the blood of the horse, and 

 found in 1000 parts : 



Blood of aorta. Blood of vena cava descendens. 



Water .... 783-83 795-G-9 



Blood-corpuscles . . 122-68 106-759 



Albumen with its salts, ex- 

 tractive matter and salts 



} 



93-49 97-562 



Blood of carotid. Blood of jugular vein. 



Water .... 785-5 804-55 



Blood-corpuscles . . 125-6 111-03 



Albumen with its salts, ex- 

 tractive matter and salts 



88-9 84-45 



These analyses diflPer from my own, and from those of Denis 

 and Hering, in assigning to arterial a larger solid residue than 

 to venous blood. 



The quantity of blood-corpuscles is also greater in arterial 

 than in venous blood, and Lecanu found the same to be the 

 case with regard to the quantity of fibrin. The quantity of 

 albumen fluctuated. 



Schultz^ observed that the venous blood of hungry and starv- 

 ing horses contained a larger amount of solid residue than 

 the arterial, in the proportion of 186 to 155 in 1000 parts of 

 blood : in a well-fed horse the reverse was the case, the solid 

 residue of the arterial being to that of the venoiis blood, in the 

 proportion of 229 to 195. The quantities of fibrin were very 

 fluctuating : on one occasion the fibrin of the arterial was to the 

 fibrin of the venous blood in the proportion of 5 "3 to 8*1; on 

 another occasion as 9-2 to 9*0. The hsematoglobulin (which he 

 considers identical with the colouring matter of the blood) was 

 found to vaiy directly with the darkness of the blood's colour, 



' Etudes chimiques sur le Sang humain. Paris, 1837, p. 83. 

 ' Svstem der Cirkulation, p. 138. 



i 



