420 URINE. 



observed to occur, was dependent on the decomposition of these 

 nitrogenous matters or upon the stimulus communicated to the 

 entire organism. 



Aniline, as it would appear from the experiments of Wohler 

 and Frerichs, does not re-appear in the urine. 



No direct experiments have been made with other organic bases 

 in reference to their transition into the urine. 



Alloxantln appears, from the experiments of Wohler and 

 Frerichs, to be converted in the animal body into urea and other 

 substances ; they found neither the substance itself, nor alloxan, in 

 the urine of persons who had taken five or six grains of it. 



Thiosinnamine does not pass unchanged into the urine ; in its 

 place we find sulphocyanide of ammonium : hence it undergoes the 

 same decomposition in the body as we can artificially produce by 

 soda-lime. (W. and Fr.) 



Allantoine does not pass into the urine, nor does it induce any 

 augmentation of the oxalate of lime, as might have been expected ; 

 since it is decomposed artificially by alkalies into oxalate of 

 ammonia (see vol. i., p. 174). 



Aw,ygdalin cannot be rediscovered with certainty in the urine. 

 (W. and Fr.) 



I could not detect the presence of asparagin in the urine. 



Salicin undergoes the same decomposition in the animal organism 

 that is induced by oxidizing agents. Salicylous acid* is found 

 in the ethereal extract ; it might be supposed that the salicin is 

 decomposed in the animal body, in the same manner as by emul- 

 sin, into sugar and saligeriin, and that it is only on the evaporation 

 of the urine that the latter is converted by the free acid which is 

 present into salicylous acid; since, however, no substance in 

 the animal body acts upon amygdalin in the same manner as emul- 

 sin, it is by no means probable that salicin undergoes the last 

 named mode of decomposition. 



Phlorrhizin has not been rediscovered in the urine. 



Volatile oil of bitter almonds (free from prussic acid) seems first 

 to be converted into benzoic acid (without giving rise to any symp- 

 toms of poisoning), and then appears as hippuric acid in the urine. 

 (W. and Fr.) 



Quinone is decomposed in the animal organism, (W. and Fr.) 



Eenzoic ether causes an augmentation of the hippuric acid in 

 the urine. (W. arid Fr.) 



According to Wohler most pigments and many odorous 

 * Hanchvorterb, derPhysiol. Bd. 2, S. 15, 



