£ 76 ANALYSIS OF A MINERAL WATER. 



white powder that was left was washed, and exposed to a red 

 heat. It weighed gr. 3. 



58. In order to obtain a nearer approximation to the q nan- 

 Sulphate of tity of sulphate of lime, contained in a given portion of the 

 hme, mineral water, than that which was obtained in 56, wherein 



dissolving the muriates a part of the sulphate was probably 

 redissolved, 22045 grains of the mineral water were evapo- 

 rated to about one eighth of their bulk, and filtered. A 

 known proportion of muriate of barytes was then added. 

 A slight cloudiness was perceived in a few minutes. Twenty- 

 four hours after, the small quantity of precipitate, that had 

 formed, wa§ separated by a filter, washed, and dried. Allow- 

 ing for what was lost upon the filter it amounted to 0*25 

 nearly. 



59. 22045 of the mineral water were exposed for some 

 days to the atmosphere and filtered: nitrate of silver was 

 then added, until no farther precipitation ensued. The 

 whole was poured upon a filter, and the precipitate was 

 well washed, and dried for twenty-four hours in a stove at 

 212° nearly. The muriate of silver thus formed weighed 

 937'25 grains, which multiplied by 4 give 3749 grains for 

 the quantity of muriate of silver formed by muriatic acid 

 contained in 88180 of the mineral water. 



60. If we suppose the muriate of silver to contain 18 per 

 cent of acid ; the quantity of muriatic acid would amount 

 to 674*82 grains. 



If grs. 482*25 of muriate of lime contain gr. 202*545 



143*45 of muriate of magnesia . • . 81*766 



57'3 of muriate of alumine .... 17*19 



Muriate of of muriatic acid ; there will be gr. 787 of muriate of soda, 



soda. supposing it to contain 50 per cent of base, 44 of acid, and 



6 of water. 



The muriate 6l. A given quantity of the mineral water was evaporated 



of soda found to dryness, and digested in alcohol of '815 applied in sue- 

 in a different . J ... l l 

 ^wav. cessive proportions to dissolve the earthy muriates. The 



muriate of soda thus obtained was decomposed by nitrate 

 of silver. The result of this experiment was nearly as above. 

 The following therefore may be considered as a near ap- 

 proximation to the quantity of gaseous and solid contents 



contained 



