266 PROCEEDINGS OF THE AMERICAN ACADEMY 



by strongly basic radicals. Of the many structure-formulie which 

 have thus far been proposed for uric acid only two contain this 

 arrangement of the hydrogen atoms. These are the formulas of 

 Medicus, * — 



NH - CO 

 / i 



CO C - NH V 



\ II CO 



NH - C-NH / 

 and of Fittig,f — 



/NH - C x — NII\ 



CO i CO CO 



\NH - C/— NH/ 



Further discussion of these formulae, or of others fulfilling the 

 same conditions, must be reserved for a subsequent paper. 



H. B. H. 



* Ann. Chem. u. Pharm., clxxv. 213. 



t Grundniss. der Organischen Chemie, 10th edition, p. 309. 



