ANIMAL ACIDS DESTITUTE OF AZOTE. 



CHAPTER I. 



OF ANIMAL ACIDS DESTITUTE OF AZOTE. 



THESE acids are twenty-two in number. The following table 

 shows their names: 



1. Mesoxalic. 12. Lipic. 



2. Formic. 13. Azelaic. 



3. Succinic. 14. Azoleic. 



4. Lactic. 15. Butyric. 



5. Suberic. 16. Phocenic. 



6. Sebacic 17. Caproic. 



7. Choloidic. 18. Capric. 



8. Cholic. 19. Hircic. 



9. Pyrozoic. 20. Ambreic. 



10. Pimelic. 21. Castoric. 



11. Adipic. 22. Bombycic. 



As nine of these acids have not hitherto been subjected to 

 analysis, their constitution is unknown. It is only from analo- 

 gy that they have been placed here. 



SECTION I. OF MESOXALIC ACID. 



This acid was discovered by Wohler and Liebig, and an 

 account of it published by them in 1838.* When a saturated 

 solution of alloxanate f of barytes is raised to the boiling tempe- 

 rature and allowed to cool, a precipitate falls, which is a mix- 

 ture of carbonate, alloxanate, and mesoxalate of barytes. If we 

 evaporate the residual liquid we obtain a crystalline crust, From 

 this crust alcohol separates urea,| and leaves mesoxalate of ba- 

 rytes. 



If we let fall drop by drop a solution of alloxan into a boil- 

 ing solution of acetate of lead, a very heavy granular precipi- 

 tate of mesoxalate of lead falls and urea remains in solution. 



* Annalen der Pharmacie, xxvi. 298. 



f This acid will be described in a subsequent section. It is one of the acids 

 containing azote. 



J An animal oxide which will be described in a subsequent part of this work. 

 Another animal oxide to be described afterwards. 



