248 BLOOD. 



representing the amount of fat contained in the venous clot after 

 the use of the starch, may perhaps be influenced by an error of 

 observation. 



The blood of women is, according to Becquerel, generally 

 somewhat richer in fat than that of men. 



The serum of arterial blood contains less fat than that of 

 venous blood : in this respect my results coincide with those of 

 Simon ; in the arterial serum of a horse I found 0'264^ of fat, 

 which amounted to 2'479^ of the solid residue ; while in the venous 

 serum I found 0*393, or 2*9S4-g- of the solid residue. In the 

 serum from the jugular veins of starved horses, Schmid found that 

 the fat averaged only 0'07 (or O93 of the solid residue), while in 

 horses that had been well fed it amounted to 0'13^ (or 1'14-g- of 

 the solid residue). 



The difference between the results of my experiments and 

 those of Schmid may appear striking ; I must, however, remark 

 that the blood of the horse whose arterial and venous blood were 

 examined before and after the three days 5 exclusive feeding on 

 starch, contained more fat than that of any other horse I ever met 

 with ; this also throws some light upon the numbers (quoted in 

 the next paragraph) which I obtained in a comparative determina- 

 tion of the fat in ffie portal and the hepatic venous blood, and 

 which are singularly small, although these kinds of blood usually 

 contain more fat than ordinary arterial or nervous blood. The blood- 

 cells of this horse did not contain any corresponding augmentation 

 of fat (as may be seen from the previously quoted numbers), so 

 that the great abundance of fat which was presented both by the 

 venous and arterial blood of this horse was entirely limited to the 

 serum. I do not find it recorded in my note-book that the 

 serum was turbid, or that fat-globules were perceived under the 

 microscope. 



The serum of portal blood is, according to Schultz and Simon, 

 far richer in fat than that of jugular venous blood : in the portal 

 serum of fasting horses, Schmid found on an average 0*1 of fat (or 

 1*36$ of the solid residue), and in that of well-fed horses 0*21$ 

 (or 2-06 of the solid residue) ; 1 found on an average 0'2843-g- of 

 fat (or 3'645 of the solid residue) in the portal serum of horses 

 which had been fed from 5 to 10 hours previously. 



The serum of the blood of the hepatic veins contains far less fat 

 than that of the portal blood, but far more than that of the jugular 

 veins; on an average I found it to contain 0'2722g- of fat, or 

 2-56S of the solid residue. 



