310 



APPENDIX. 



6. URIC OR XANTHIC OXIDE, a 



Carbon 

 Hydrogen 

 Nitrogen 

 Oxygen , 



Wbhler and Licbig.* 



. 39-28 



2-95 



. 36-35 



21-24 



Calculated C s H 2 N 2 O 2 . 



39-76 



260 



36-84 



20-80 



a Ann. der Pharm., XXVI., 344. 



Carbon 

 Hydrogen 

 Nitrogen 

 Oxygen . 

 Sulphur 



7. CYSTIC OXIDE, a 



Thaulow.* 



. 30-01 

 5-10 



. 11-00 



28-38 



, 25-51 



Calculated C 6 H 6 NO4 S 2 . 



30-31 

 4-94 

 11-70 

 26-47 

 26-58 



a Ann. der Pharm., XXVII., 200. 



The cystic oxide is distinguished from all the other 

 concretions occurring in the urinary bladder by the sul- 

 phur it contains. It can be shown with certainty, that 

 the sulphur is present neither in the oxidized state, nor in 

 combination with cyanogen ; and in regard to its origin 

 the remark is not without interest, that four atoms of 

 cystic oxide contain the elements of uric acid, benzoic 

 acid, sulphuretted hydrogen and water ; all of which are 

 substances, the occurrence of which in the body is be- 

 yond all doubt. 



1 atom uric acid . . 

 1 atom benzoic acid 

 8 atoms sulphuret- ) 

 ted hydrogen ) 

 7 atoms water . 



H 8 S, 

 H 7 7 



4 atoms cystic oxide =C 24 N 4 H 24 O I6 S 8 = 4 (C 6 NH 6 O 4 S 2 ). 



