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 ofiron, - ato» OD 
Carbonate of soda, 
Sulphate of soda, 
Chloride of sodium, eet: 
Organic matter, 
Carbonic acid gas, — 
7.6 
Boston, March, 1836. 
Art. V.—Chemical Analysis of Water from the Azores. Wa- 
ter called Aqua Azéda; by Cuarves 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 -“ 
Silicic acid, . 0. 
Carbonate ofiron, - - 0.30 
Carbonate of magnesia, - 0.02 
Carbonate of lime, - - 0.01 
Carbonate of soda, 
Chloride of sodium, i nisi 
Sulphate of soda, - - 0.01 
Carbonic acid 2 sage Be 
” 1.39 
