270 ANALYSIS OF A MINERAL WATER. 



tered, and was previously warmed. Ntf flavour of sulphur- 

 etted hidrogen was perceptible, 

 muriatic acid: M< The mineral water previously Wiled was treated, irs 

 in 10, with muriatic acid ; no change was produced in its 

 transparency, nor was any flavour pcp-cptrble except of the 

 muriatic acid. 

 ieaf silyer: 12. Silver leaf Uft in contact with a portion of the fresh 



water, in a closed phial, for several days, was not percepti- 

 bly tarnished, 

 nitrate of mer- 13. Nitrate of quicksilver produced a copiofrs white pre- 

 cur >' : cipitate. 



oxide of bis- 14. a. Oxide of bismuth mixed with the fresh water in- 

 , : . the proportion of 4 grains to 4 oz. was very slightly dark- 



ened. 



b. With the boiled water no change of colour was pro- 

 duced. 

 acetate of lead: 1.5. a. Acetate of lead threw down from the fresh water 

 a dense white precipitate. When the precipitate had wholly 

 subsided, the surface of it was of a pale ochre or fawn co- 

 lour, apparently produced by the oxide of iron only. 



h. With the mineral water, after being exposed to the 

 atmosphere for a few hours, and decanted, the precipitate 

 was a pure white, 

 niuateof lead: \(y. Nitrate of lead threw down a dense precipitate of a 



pure white colour, 

 nitric acid: 17. Nitric acid produced no change in the fresh water, 



nitrate of sil- 18. Nitrate of silver produced a dense white precipitate, 

 which was kept for several days in a dark room, without un- 

 dergoing the least change of its colour, 

 acetite of sil- 19. a. A few drops of acetite of silver threw down a pre- 

 cipitate of a rather dull white colour. It was kept in a 

 dark room for 24 hours, when it appeared somewhat dark- 

 ened. 



b. The boiled water treated in the same manner did not 

 darken the acetite of silver, 

 muriate of 20. a. Muriate of quicksilver, added to the fresh water, 



totrcurji produced no immediate change. After a few minutes the 



water became slightly opaque, and a slight precipitate at 

 length appeared. It scarcely exceeded the quantity of ox- 

 ide of iron which the water contained, but the colour was of 



a redder 



