URANIUM. 23 



1- atoms water . . 4-5 



11 atom sulphuric acid . 7' 5 



1 atom sulphate of potash 1 1 



23-0 

 Deficiency . . 28 



51 



This deficiency must consist of peroxide of ura- 

 nium ; consequently, 28 must represent the 

 weight of an atom of peroxide of uranium ; and 

 the compound salt must consist of 



1 atom sesquisulphate f 1 atom acid 7*5 1 

 of uranium L 1 atom oxide 28 3 



1 atom sulphate of potash . . . 11 



4 atoms water . . . 4-5 



51 



6. The combination of nitric acid and perox- Analysis of 



persesqui- 



ide of uranium crystallizes very easily in large nitrate of 



n r . , , . uranium. 



Mat tour-sided rectangular prisms. Its co- 

 lour is a fine lemon yellow its taste is astrin- 

 gent and acid, and it reddens vegetable blues, 

 even after having been three times dissolved in 

 pure water and crystallized it is exceedingly 

 soluble both in water and alcohol it melts in its 

 water of crystallization when exposed to a mo- 

 derate heat. 



(1.) 57-25 grains of the crystals of this salt 

 were gradually heated in a platinum crucible till 



B4 



