IN THE KIDNEY. 51 



dilated to the extent of more than an inch. A 

 coagulum of blood plugged up the lower end of 

 this portion, and on removing it by the division of 

 the tube, a few drops of bloody urine escaped, then 

 some clearer fluid, then a white fibrinous coagulum, 

 and, above all, some twenty drops of clear urine. On 

 allowing the latter to fall into a watch-glass, without 

 any admixture of the bloody urine, and then adding 

 nitric acid, it was found to be very highly albumi- 

 nous, instantaneous coagulation being produced by 

 this test. 



Exp. 7, The left kidney of a middle-sized rabbit, 

 in rather good condition, was removed, and found 

 to weigh 54 grs. The aorta was then tied, without 

 any accident occurring, and was followed by the 

 usual paralysis. This animal seemed to recover 

 from the shock of the operation more quickly than 

 some former ones ; it was killed at the end of two 

 hours. The right kidney weighed 85 grs. ; it con- 

 tained six or seven ecchymoses of various extent, in 

 different parts of its substance, but chiefly on the 

 surface ; its colour was much lighter than in those 

 experiments in which the engorgement of the organ 

 was produced by venous obstruction. The bladder 

 contained about a drachm of urine, which was bloody 

 and albuminous. 



(These experiments have been repeated by Pro- 

 fessor Frerichs in Germany, on different animals, 

 with precisely similar results. He also examined 

 the urine microscopically, and found it to exhibit 

 the fibrinous casts of the tubuli uriniferi, and the 

 copious epithelial cells so often noticed in Bright's 



