ANALYSIS OF A MINERAL WATER. £#9 



but the tint gradually went off, and in three hours the co- 

 lour was distinctly blue. 



c. An equal quantity of the mineral water, which had been 

 boiled and filtered, produced no change of colour of the 

 tincture of cabbage at first, but when examined ten mi- 

 nutes afterward it was slightly blued. 



3. a. Pure distilled water coloured with a certain portion litmus: 

 of tincture of litmus as a standard. 



b. The fresh mineral water in the same proportion pro- 

 duced the slightest tint of red. It soon vanished. 



c. The mineral water which had been boiled and filtered 

 produced no change. 



4. fit. Pure distilled water was tinged with infusion of rhu- infusion of 

 barb in given proportion as a standard. r ■ ark; 



b. The fresh mineral water tinged with an equal propor- 

 tion was very slightly deepened. 



c. The boiled water tinged as above could not be distin- 

 guished from pure distilled water. 



5. Corresponding experiments were made with infusion infusion o£ 

 of brasil. Both the fresh and the boiled mineral water pro- ra * : 

 dueed the slightest tint of blue. 



6. Sirup of violets was changed to a green by the fresh sirup of violets: 

 water. The boiled water produced no change on it. 



7. a. A few drops of infusion of galls added to the fresh infusion of 

 mineral water produced a violet colour, the water gradually S aJis: 

 became opaque, and in twenty-four hours had thrown down 



a rather copious precipitate of a violet red colour. The li- 

 quid above was transparent and colourless. 



b. The infusion of galls produced no change in the mine- 

 ral water after boiling. 



8. a. Lime water in very small quantity produced a pale Iimewater: 

 ochrey precipitate in the fresh mineral water. 



b. On adding to the fresh mineral water an equal part of 

 lime water, a white precipitate formed, which dissolved 

 again in nitrous acid. 



9. Strong sulphuric acid rendered the fresh water turbid, sulphuric acid, 

 and disengaged a number of air bubbles. An abundance strons 



of sulphate of lime formed. 



10. A few drops of diluted sulphuric acid was added to and diluted: 

 .some of the mineral water, which had been boiled and fil- 

 tered, 



