METABOLISM OF THE CAT. 



343 



EXPERIMENT VL 



Three cats were fed. In addition to uric acid determinations, total nitro- 

 gen was estimated in the urine by the Kjeldahl method : and phosphoric 

 acid by titration with uranium solution. The thymus was a desiccated pre- 

 paration used in other experiments. 



urine after pancreas feeding, even before the urine is concen- 

 trated. In view of Salkowski's experience with dogs,* we 

 have searched for allantoin in the urine of the cat after meat 

 diet, but without success. 



Uric acid feeding Since it has been demonstrated that uric 

 acid ingested, in the case of the dog, is excreted again in 

 part as allantoin,! similar experiments were carried out on 

 the cat. Thus, two cats used in previous experiments were 

 fed 6 grams of uric acid mixed with 200 grams of chopped 

 meat. The urine 360 c. c. collected on the three succeed- 

 ing days was concentrated, and about 0.5 gram of allantoin 

 was obtained. In another experiment, in which 4 grams 

 were fed with 200 grams of lean meat to two cats, 0.3 gram 

 allantoin was obtained. In this respect also, then, the meta- 

 bolic processes of the cat resemble those of the dog. 



* Salkowski, Berichte der deutschen chemischen Gesellschaft, 1878, xi, 

 p. 500. 



t Salkowski, ibid., 1876, ix, p. 719. 



