212 Mineralogical and Chemical 



sited. This was evidently occasioned by the presence 

 of a small quantity of carbonic acid gas. 



EXPERIMENT II. 



A solution of soap in alcohol, when poured into a 

 glass of this water, remained so far undisturbed that no 

 fiocula were thrown down, but it mixed uniformly with 

 it into a smooth opaline solution. This shows that it 

 cannot be classed among the hard waters, and that it 

 contains neither acids nor earthy carbonates sufficient 

 to curdle the soap. 



EXPERIMENT III. 



Paper stained with litmus, when dipped into the water, 

 was not altered in colour. By this it was evident that it 

 contained no uncombined acid, as this test is so delicate, 

 that it would indicate the presence of even so weak an 

 acid as the carbonic. 



EXPERIMENT IV. 



Paper stained with turmeric remained unaltered in co- 

 lour, when dipped into the water, which shows that no al- 

 kaline salts were contained in it, in an uncombined state. 



EXPERIMENT V. 



When a few drops of prussiate of potash are poured 

 into a glass of the water, the colour of it scarcely suffers 



