92 Analysis of the Mineral Waters at Cheltenham. 

 hydrate of barytes: the solution being evaporated to dryness, 

 indicated (with that obtained in Experiment XXXIV.^ 66'5 

 grains of sulphate of lime in 231 cubic inches of the water. 



Experiment XXXIX. — The residue left in the preceding 

 process was lastly digested in nitro-muriatic acid, com- 

 posed of equal parts of nitric and muriatic acids evaporated 

 nearly to dryness, and re-dissolved in the least possible 

 quantity of water : the fluid did not yield a precipitate by- 

 liquid ammonia, nor by succinate of soda, or tincture of 

 galls; lime water rendered it turbid, and fluate of soda pro-- 

 duced much cloudiness. 



Experiment XL. — To effect the decomposition of this so- 

 lution, it was evaporated to dryness, and the dry mass redis- 

 Bolved in the least possible quantity of water previously min- 

 gled with one part of alcohol. Into this fluid, when heated, 

 a mixture of equal parts by bulk, of sulphuric acid and al- 

 cohol, was poured, till it produced no further cloudiness. 

 The sulphate of lime obtained proved that 18 grains of car- 

 bonate of lime were present in 231 cubic inches of water; 

 taking 100 grains of the precipitate to be equal to 6-1 of 

 carbonate of lime. 



Experiment XLT. — The fluid separated by the filter, being 

 again evaporated to dryness and redissalved in distilled wa- 

 ter, was made boiling hot, and then mingled with a solution 

 of sub-carbonate of potash. The sub-carbonate of magnesia 

 produced, indicated 5*75 grains of this substance to be pre- 

 sent in 231 cubic inches of water. 



The analysis being now completed, we are led to believe that 

 the contents of the sulphuretted saline water are the following} 



Muriate of soda 

 Sulphate of magnesia 

 Hydro-sulphuret of lime 

 Muriate of magnesia 

 Sulphate of lime 

 Muriate of lime 

 Sulphate of soda 

 Carbonate of lime 

 Carbonate of magnesia 



Carbonic 



