Analyses of Mineral Waters. 95 



tion of the water tested for sulphates, gave a white cloud, with ace- 

 tate of barytes. The water, tested for soluble chlorides by solution 

 of nitrate of silver, an abundant precipitate of chloride of silver was 

 formed. After separation of the chloride of silver, the water, with 

 slight excess of nitrate of silver, being exposed to sun light, a dark 

 reddish brown precipitate forms, indicating the presence of organic 

 matter. 



Sp.gr. of the water is 1.0022, pure water being 1. 5000 grs. of 

 the water, evaporated to dryness in a green glass dish, left 8.25 grs. 

 of solid matter, of a straw yellow color, and containing numerous 

 brilliant scales of silicate of soda, and crystals of chloride of sodium. 

 It was observed while the evaporation of the water was going on, 

 that gelatinous flocculi of the hydrate of silica separated, and to- 

 wards the close of the evaporation the whole mass became very ge- 

 latinous, and required great care to avoid loss of matter by projec- 

 tion from the vessel. The dry mass was 8.25 grs. in 5000 grs. 

 of water, and on analysis, was found to consist of 



Carbonate of soda, 



Silicate of soda, 



Chloride of sodium. 



Silicic acid. 



Sulphate of soda, 



Boracic acid? and 



T . , . ( a trace. 



Liithia, > 



No iodine, bromine, lime or potash, discovered. 



The quantity of silicic acid contained in 5000 grs. of this water, 

 is 1.6 grs. It is retained in solution in the state of silicate of soda. 

 When the soda is exposed to the air, it attracts carbonic acid, and 

 the silica is deposited. It is a very remarkable water, and of great 

 geological interest. 



Analysis of Water, "from the reservoir into which the hot water 

 rises.^' Mark No. 2, " three strings on neck." 



This water is clear and transparent ; has a ferruginous taste ; a 

 few bubbles of gas escape when it is uncorked. Tested by lime 

 water, it gives a precipitate of carbonate of lime ; by hydro-sulphate 

 of ammonia, black precipitate of sulphuret of iron ; and by ferro- 

 cyanate of potash, blue precipitate takes place. Acetate of barytes 

 gives a white cloud of sulphate of barytes. Nitrate of silver gives 

 an abundant precipitate of chloride of silver, and the supernatant 



