OF LIME. 293 



ing up the heat till the carbonate of strontian 

 became white. It weighed 9*&5 grains. Hence, 

 the constituents of the salt are 



1 atom tartaric acid 8-25 



1 atom strontian . 6'*5 

 3 atoms water . 3-375 



18-125 



The salts of strontian resemble those of bary- 

 tes, though there is a tendency in these salts to 

 contain more water. Six of the salts described 

 above, or one half of the whole, are anhydrous ; 

 two contain 1 atom water ; and we have a single 

 salt with 2, 3, 4, and 8 atoms of water respec- 

 tively. 



6. SALTS OF LIME. 



1. Sulphate of lime. Of this salt there are sulphate, 

 two species, both found native ; namely, the an- 

 hydrous and hydrous. 



(1.) Anhydrous sulphate of lime, distinguished Anh y- 

 by mineralogists by the name of anhydrite, crys- 

 tallizes in right rectangular prisms. Its consti- 

 tuents are 



i atom sulphuric acid 5 



1 atom lime 3-5 



8-5 

 T3 



