38ff On a Mineral Water, 



which liquid the whole was dissolved, with the exception of 

 -f^ grain, which was iodide of silver, and is equivalent to -xJ^r 

 grain of hydriodide of potassa, in which state it existed in the 

 mineral water, as was indicated by muriate of platina. This 

 1.8 grain of alcoholic residue, therefore, consisted of chloride of 

 silver 1.7 grain, equivalent to 0.7 grain of chloride of sodium, 

 and ^f^J grain of iodide of silver, equivalent to -j-J^ grain of 

 hydriodide of potassa. 



3. The residue, not soluble in alcohol, was digested in as 

 small a portion of water as possible, to dissolve all the soluble 

 part of it; the insoluble residue was dried, and weighed 2.7 

 grains; it was then treated with muriatic acid, and the whole 

 was dissolved with effervescence except -r^^ grain of oxide of 

 silicium ; the residue, insoluble in Avater, therefore consisted 

 of carbonate of lime dissolved by muriatic acid 2.4 grains, 

 and oxide of silicium ^v grain. 



4. The solution Avhich contained the remaining salts was 

 now treated with acetate of barytes, to ascertain the quantity 

 of sulphuric and carbonic acids in combination ; the precipi- 

 tate was collected, dried, and weighed 20 grains ; it was then 

 treated with muriatic acid, which dissolved the carbonate of 

 barytes formed with effervescence ; the remaining precipitate 

 ■undissolved was sulphate of barytes, which, when submitted 

 to a red heat, weighed 4.2 grains ; these were deducted from 

 the former weight, and 15.8 grains remained due to the car* 

 bonate of barytes. We have, therefore, 4.28 grains of sul- 

 phate of barytes, equivalent to 1.43 sulphuric acid, or -^ 

 2.52 sulphate of soda; 15.8 grains carbonate of ditto, equi- 

 valent to 3.47 carbonic acid, or — 8.4 carbonate of soda. 



5. The remaining solution now contained only the muriates 

 and acetate of soda, which were decomposed by acetate of 

 silver; the precipitate was then collected, dried, and weighed 

 136.1 grains, which were chloride of silver, and equivalent to 

 34.4 grains of muriatic acid, and 57 grains of chloride of 

 sodium, or common salt. 



The remaining solution was evaporated, and crystals of ace- 

 tate of soda obtained. 



7. A portion of this crystallized salt was then dissolved, and 

 tested with muriate of platina, for potash, but no precipitate 

 appeared ; these crystals, therefore, contained no potash. 



