ALLOXANIC ACID. 4? 



When decomposed by oxide of copper the volume of azotic 

 gas was to that of carbonic acid gas as 1 : 3. 



The mean of two analyses, the first by oxide of copper, the se- 

 cond by chromate of lead, gave the following constituents of the 

 salt: 



Carbon, 14-20 or 8 atoms = 6 or per cent. 15.84 

 Hydrogen, 1-17 or 3 atoms = 0-375 . 0.99 

 Azote, 9-21 or 2 atoms 3-5 . 9-24 



Oxygen, 26-07 or 9 atoms = 9-0 . 23-76 

 Barytes, 49-35 or 2 atoms = 19.0 . 50-17 



37-875 100. 



According to this analysis the atomic weight of alloxanic acid 

 is 18-875. But it was afterwards found, that when the salt was 

 heated to 302 it lost 2 per cent of water, which is nearly equi- 

 valent to one atom. Hence the atomic weight of the acid is 

 17-75, and its constitution C 8 H 2 Az 2 O 8 , and alloxanate of bary- 

 tes is, 



1 atom alloxanic acid, . 17*75 



2 atoms barytes, . 19* 



36-75 



Alloxanate of Strontian. This salt may be prepared in the 

 same way as alloxanate of barytes. It is in the form of small 

 acicular transparent crystals, containing water of crystallization. 

 When decomposed, the volumes of azotic and carbonic acid gases 

 obtained are to each other as 1 : 3. At 248 it loses 22-5 per 

 cent of water. 100 parts of the crystals left when ignited, 45-16 

 of carbonate of strontian, equivalent to 31-73 of strontian. 

 Hence the constituents of the salt are, 



Alloxanic acid, 45*77 or 1 atom = 17-75 or per cent. 44 '66 

 Strontian, . 31-73 or 2 atoms = 13.00 32-70 



Water, . 22'50 or 8 atoms = 9-00 . 22-64 



39-75 100. 



Alloxanate of Lime. When we add chloride of calcium to a 

 solution of alloxane, no precipitate falls until ammonia be ad- 

 ded, which occasions the separation of a thick gelatinous depo- 

 site, very soluble in acetic acid, and becoming crystalline when 



