STRONTIAN AND STRONTIUM, 



fully collected and exposed to a red heat, 

 weighed 11 '5 grains. Now, it contained all the 

 sulphuric acid in 9 grains of anhydrous sulphate 

 of soda, which is just 5 grains. The remaining 

 6%5 grains must be strontian. Thus it appears, 

 that sulphate of strontian is composed of 



Sulphuric acid 5 

 Strontian 6-5 



11-5 



5 being the atomic weight of sulphuric acid, and 

 the salt being neutral, G5 must be the atomic 

 weight of strontian. 



The soda in 9 grains of anhydrous sulphate 

 of soda amounts to 4 grains, which requires for 

 saturation 4*625 grains of muriatic acid, equiva- 

 lent to 4%5 grains of chlorine and this must be 

 the quantity of chlorine in 10 grains of chloride 

 of strontium. If from 10 we subtract 4\5, the Atom . of 



strontium. 



remainder is 5%5, which indicates the quantity of 

 strontium in 10 grains of this chloride. This 

 5-5 of strontium, when converted into strontian 

 in the sulphate, becomes 6\5. Hence, it is ob- 

 vious that strontian is a compound of 1 atom 

 oxygen, and 1 atom strontium ; and tha an 

 atom of strontium weighs 5%5. 

 Muriate of strontian crystallizes in long needles, Muriate of 



. . ,. . , , T n strontian. 



consisting of six-sided prisms, two opposite races 

 of which are broader than the other four. By 



VOL. I. S 



