46 EXPERIMENTS ON THE CIRCULATION 



precipitation of crystals of nitrate of urea. The left 

 kidney weighed 21 grs. ; the right, 26 grs. 



Exp. 3. At the same period, after the operation, 

 this animal was treated in the same manner as the 

 last ; it lived twelve hours longer than it. There 

 was no albumen in the urine ; nor did any deposit 

 of urea take place on adding an equal quantity of 

 nitric acid. The left kidney weighed 20 grs. ; the 

 right, 33 grs. 



Exp. 4. Nine days and a half after the removal 

 of its left kidney, this animal appeared quite well ; 

 it was then killed. The bladder contained a small 

 quantity of urine, which yielded a faint cloudiness 

 when treated with nitric acid. The left kidney 

 weighed 21 grs, ; the right, 50 grs. 



Exp. 5. The left kidney of a middle-sized strong 

 rabbit was removed, and the animal killed at the 

 end of nine days. The left kidney was unfortu- 

 nately not weighed ; the right was evidently much 

 enlarged. The urine in the bladder was not albu- 

 minous. 



B, Ligature of the aorta, below the origin of the 



renal arteries. 



Exp. 1. In a small weak rabbit, the abdominal 

 aorta was tied, from an incision on the right side of 

 the spine, which added to the difficulty, and, conse- 

 quently, increased the shock of the operation. There 

 was immediate and permanent paralysis of the hinder 

 extremities. The animal died about ten hours after 

 the operation. Both kidneys appeared dispropor- 



