40 EXPERIMENTS ON THE CIRCULATION 



being examined, contained no albumen, a few drops 

 of nitric acid rendering it quite clear. The aorta 

 had been torn rather more than two-thirds across ; 

 its compression, by the infiltration of the surround- 

 ing cellular tissue with a considerable quantity of 

 blood, probably prevented the return of hemorrhage 

 by obliterating the vessel at that point 



B. The canal of the renal vein being either par- 

 tially or slowly obstructed. 



Exp. 1. The animal was of middle size, but in 

 poor condition. In tying the vein there was some 

 haemorrhage from a lateral branch. The animal 

 had previously met with a slight accident, and 

 seemed faint at the time ; it was killed at the end 

 of an hour, and the urine in the bladder was slightly 

 but distinctly albuminous. The right kidney weighed 

 40 grs. ; the left, 84 grs. 



Exp. 2. In passing a ligature round the vein of a 

 rabbit of middle size, and in moderate condition, the 

 coats of the vessel were torn, and some haemorrhage 

 occurred, which was soon arrested by compression ; 

 it was killed at the end of half an hour. The blad- 

 der contained two drachms of urine which was 

 highly albuminous. The right kidney weighed 50 

 grs.; the left, 150 grs. 



Exp. 3. The left renal vein of a middle-sized 

 weak rabbit was exposed, compressed for a few 

 minutes, and then slightly torn, so as to allow a 

 little blood to escape. The vessel was then securely 

 tied, and the animal killed seven minutes after the 



