282 EXCBETION. 



on the same side was then exposed, and a specimen of blood 

 was taken from that vessel. The animal was very quiet 

 under the operation, though no anaesthetic was used, so that 

 the blood was drawn without any difficulty and without the 

 slightest admixture. 



The three specimens were analyzed for cholesterine, with 

 the following results : 



Quantity of Blood. Cholesterine. Cholesterine per 

 grains. grains. 1,000 pts. 



Carotid 143-625 0-679 0-967 



Internal jugular 29'956 0'046 1-545 



Femoral vein 45'035 0'046 1-028 



Percentage of increase in the blood from the jugular over the arterial 



blood 59-772 



Percentage of increase in the blood from the femoral vein 6*308 



Experiment IY. A large and powerful dog was secured 

 to the operating-table, and the carotid and internal jugular 

 exposed. Specimens of blood were taken from these vessels, 

 first from the jugular, and were carefully weighed and ana- 

 lyzed for cholesterine in the usual way. The following re- 

 sults were obtained : 



Blood. Cholesterine. Cholesterine per 



grains. grains. 1,000 pts. 



Carotid 140*847 0-108 0*768 



Internal jugular 97*811 0'092 0'947 



Percentage of increase in the blood passing through the brain 23*307 



Experiment III. shows a very considerable increase in the 

 quantity of cholesterine in the blood passing through the 

 brain, while the increase is comparatively slight in the blood 

 of the femoral vein. The proportion of cholesterine is also 

 large in the arterial blood, compared with other observations. 



Experiment IY. shows but a slight difference in the 

 quantity of cholesterine in the arterial blood in the two ani- 

 mals ; the proportion in the animal that was etherized being 

 0*774: per 1,000, and in the animal that was not etherized 

 0-768 per 1,000, the difference being but 0'006 ; but, as was 

 suspected, the ether seemed to have an influence on the quan- 



