96 Analyses of Mineral Waters. 



water turns black on exposure to sun light. The water, tested by 

 a solution of acetate of lead, a white precipitate of carbonate of 

 lead forms, but no sulphuret. From the above researches, it ap- 

 pears that this water contains carbonates, chlorides and sulphates, in 

 solution, besides a minute quantity of organic matter. Sp. gravity 

 1.002. 5000 grs. of the water, evaporated to dryness in a green 

 glass capsule, give 7.6 grs. of dry solid matter of a brown color, con- 

 sisting of 



Silicic acid, - - 1.5 



Carbonate of iron, - - 0.9 



Carbonate of soda, -v 



Sulphate of soda, f - ^^ 



Chloride of sodium, i 



Organic matter, ^ 



Carbonic acid gas, 



7.6 

 Boston, March, 1836. 



Akt. V. — Chemical Analysis of Water from the Azores. Wa- 

 ter called Aqua Azeda; by Charles T. Jackson, M. D. 



Two bottles, containing mineral water from St. Michael's, well 

 corked and sealed. When one of the bottles was opened, a copious 

 extrication of carbonic acid gas took place, accompanied by a very 

 slight odor of sulphuretted hydrogen. Taste of the water is very 

 agreeable, acidulous and brisk. When drunk, it is found to be 

 slightly tonic and antacid. Tested with lime water, it gives an 

 abundant precipitate of carbonate of lime. Its sp. gr. is =1.001. 

 5000 grs. of the water, evaporated to dryness, gave 1.4 grs. solid 

 matter of a brown color, which yields on analysis, 



1.40 



