48$ ANALYSIS OF THE 



is in larger proportion than what is indicated by the analysis ;. 

 that it acts during the evaporation of the water on the muri- 

 ates of magnesia and lime, and forms the carbonates of these 

 earths which are obtained with corresponding portions of mu- 

 riate of soda ; and that it is only what muriate of soda there 

 may be above this, that exists as an original ingredient. 



The Seltzer water, which is the purest of this order of wa- 

 ters, as containing neither iron, nor any sulphate, affords in 

 particular a very excellent illustration of this. It contains,, 

 according to Bergman's analysis, in an English pint, 



Carbonic acid gas, 



17 cubic inches. 



Carbonate of lime, 



3 grains. 



Carbonate of magnesia, 



5 



Carbonate of soda, 



4 



Muriate of soda, 



17.5 — . 



But adopting the opposite view, the composition, so far as 

 the uncertainty of the state of the products, to which Berg- 

 man's estimate is referred, admits of calculating the propor- 

 tions, will be,. 



Carbonic acid gas, - 17 cubic inches. 



Muriate of lime, - 3.3 grains. 



Muriate of magnesia, - 5 



Muriate of soda, - 7.8 



Carbonate of soda, - 10.3 — dry, or 18 crystallised *. 



It 



* The following is the calculation from which these proportions are assigned. 

 Three grains of carbonate of lime are equivalent to 3.3 of real muriate of lime : 

 5 grains of carbonate of magnesia, in the state in which it was obtained by. 

 Bergman, that is, the powder precipitated and dried, are equivalent to 5 grains 



of 



