320 APPENDIX. 



6. URIC OR XANTHIC OXIDE, a 



WOhler and Liebig. Calculated C5 H2 N2 O;. 



Carbon 39'28 39'86 



Hydrogen 2'95 2'60 



Nitrogen 36'35 37'72 



Oxygen 21'24 20'82 



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

 7. CYSTIC OXIDE, a 



Thaulow.* Calculated Ce He NOi SJ. 



Carbon 30'01 30'31 



Hydrogen 5'10 4'94 



Nitrogen ll'OO 11'70 



Oxygen 28'38 26'47 



Sulphur 25-51 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 shewn with certainty, that 

 the sulphur is present neither in the oxidised 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 beyond 

 all doubt. 



1 atom uric acid ... 

 1 atom benzoic acid 

 8 atoms sulphuret-"] 

 ted hydrogen ...J 

 7 atoms water 



C 10 N 4 H 4 6 



C 14 H 5 3 



H 8 S 8 

 H 7 7 



4 atoms cystic oxide = C 24 N 4 H 24 O 16 S 8 = 4 (C 6 NH 6 O 4 S 2 ). 



