12(5 
Mr. Schmeisser's Analysis of 
EXPERIMENT V. 
The solution, from which I had precipitated the iron, was 
evaporated, and mixed with vitriolic acid, and diluted spirit of 
wine, when 72 grains of selenite were separated : these 72 
grains of selenite having been boiled with mineral alkali, 
yielded 24 grains of calcareous earth. 
EXPERIMENT VI. 
The remainder of the solution from which the calcareous 
earth had, by means of the vitriolic acid, been separated in the 
form of selenite, yielded, by adding mineral alkali, 72-j grains 
more of magnesia. All the selenite obtained was boiled in 
1200 times its weight of water, in which it was completely 
dissolved, no siliceous earth being left. 
As a proof that the process had been properly conducted, I 
saturated both the obtained earths with diluted vitriolic acid ; 
when the first again afforded selenite, and the other vitriolated 
magnesia. 
