102 ANIMAL OXIDES WITH AZOTE NOT OILY. 



10. Molybdate of ammonium, Ml O 3 + Az H 4 O = 12-25. 



11. Vanadiate of ammonium, VO 3 -f Az H 4 O 14-75. 



12. Selenite of ammonium, Se O 2 + Az H 4 O =r 10-25. 



For farther information respecting the compounds of ammonia, 

 we refer the reader to the Memoir of M. Bineau in the Annal. 

 de Chim. et de Phys. Ixvii. 225 ; and Ibid. Ixx. 251. 



CLASS III. 



INTERMEDIATE ANIMAL OXIDES. 



THE animal principles belonging to this class have been so im- 

 perfectly examined, that the characters of many of them are only 

 inferred from very imperfect analogies. We shall divide them 

 into five sets. 



1. Oxides containing azote and not oily. 



2. Oxides not containing azote and not oily. 



3. Oily oxides saponifiable. 



4. Oily oxides not saponifiable. 



5. Colouring matters. 



It can scarcely be doubted that the oily saponifiable oxides 

 contain an acid ; and it is probable that the animal colouring 

 matters resemble the vegetable in their nature. 



CHAPTER I. 



OF ANIMAL OXIDES CONTAINING AZOTE AND NOT OILY. 



THESE bodies have been all recently discovered, and most of 

 them have been formed artificially by treating uric acid with va- 

 rious reagents. They are eight in number ; namely, 



1. Xanthic or uric oxide. 



2. Cystin. 



3. Allantoin. 



4. Alloxane or erythric acid. 



5. Alloxantine. 



k 



6. Uramile. 



7. Murexide. 

 8. Murexane. 



