4Q8 LIQUID PARTS OF ANIMALS. 



some experiments upon the urine of the lion and the tiger, and 

 obtained results differing from those of Stromeyer.* According 

 to him it is alkaline at the time of its emission. It contains, he 

 says, a quantity of ammonia ; but no uric acid nor phosphate 

 of lime. Vauquelin obtained from it the following substances : 



Mucus. Sal-ammoniac. 



Urea. Trace of phosphate of lime. 



Phosphate of soda. Much sulphate of potash. 



Phosphate of ammonia. Trace of common salt. 



XV. The urine of fowls, as was first ascertained by Dr Wol- 

 laston, consists chiefly of uric acid. It seems to be combined with 

 ammonia, and is mixed with a good deal of animal matter. 



XVI. The urine (if that name can be given to a solid excre- 

 mentitious substance) of the Boa constrictor was found by Dr 

 Prout to consist almost entirely of urate of ammonia. This fact 

 being communicated to Dr John Davy while in Ceylon, about 

 the year 1817, he was induced to examine the excrements of dif- 

 ferent species of serpents, f When thrown out it has a butyra- 

 ceous consistence, but becomes hard by exposure to the air. He 

 found it to consist chiefly of uric acid, probably in the state of 

 urate of ammonia. The urinary matter of lizards was similar. 

 That of the alligator, besides uric acid, contains a large portion 

 of carbonate and phosphate of lime. The urine of turtles was 

 liquid, containing flakes of uric acid, and holding in solution 

 a little mucus and common salt, but no sensible portion of urea. 



Some experiments on the urine of lizards (Lacerta agilis, Seps 

 viridis, varius, terrestris, sericeus, c&ruleus, &c.) had been made 

 by M. Schriebers as early as 18134 He found it to consist of, 

 Uric acid, . 94 

 Ammonia, . 2 



Phosphate of lime, 3-33 



99-33 



So that he preceded Dr Davy, and probably also Dr Prout, in 

 this curious investigation. 



* Ann. de Chim. Ixxxii. 198. f Phil - Trans. 1818, p. 303. 



J Gilbert's Annalen, xliii. 83. 



