METABOLISM OF THE CAT. 



341 



EXPERIMENT IV. 



Three cats were employed. The diet consisted of lean meat, or fresh sheep's 



pancreas. 



discussion seems unnecessary here. For the same reason 

 feeding experiments with pure nucleins were omitted. 



Experiments on allantoin excretion We have been unable 



to find any detailed references to the excretion of allantoin 

 in the cat. Meissner * has reported finding allantoin in small 

 quantities in the urine of several cats living on animal diet. 

 It seemed especially desirable to investigate the possibility of 

 allantoin excretion in the cat, since this substance has been 

 detected only rarely in the urine of man, thus giving further 

 evidence of noticeable differences between certain metabolic 

 processes of the dog and some other animals closely related. 

 Quite recently the pronounced excretion of allantoin in the 

 dog has been noted by Minkowski f and by Th. Cohn $ after 

 thymus feeding; similar observations after pancreas feeding 



Journal of Physiology, 1899, xxv, p. 98 ; Taylor, American Journal of Medi- 

 cal Sciences, 1899, cxviii, p. 141 ; (dog) Minkowski, Archiy f . Exper. Pathol. 

 u. Pharmakol., 1898, xli, p. 376. 



* Meissner, Zeitschrift fur rationelle Medicin, 1868, xxxi, p. 303. 



t Minkowski, Centralblatt fur innere Medicin, 1898, No. 19; Archly . 

 Exper. Pathol. u. Pharmakol., 1898, xli, p. 376. 



J Th. Cohn, Zeitschrift f iir physiol. Chemie, 1898, XXT, p. 507. 



