with Ohservaiions on the Analysh of Salt-lrints. 09 



vaich they are obtained by evapoiatioiij that is, as muriate of 

 soda, muriate of magnesia, sulphate of magnesia, and sulphate 

 of lime ; the proportions of tliese salts in a pint, will be 

 Muriate of soda, .. ISQ-o grains. 



magnesia, . . 23 • 



Sulphate of magnesia, . . l.vo 



■ lime, .. 7-1 



226-1 

 Supposing that the lime exists as muriate of lime, (which is 

 the most probable conclusion with regard to it,) and further sup- 

 posing, that the sulphuric acid exists in the state of sulphate of 

 liiagnesia, the proportions will be 



Muriate of soda, .. lSO-5 grains. 



• magnesia, . , IS'.S 



-^ lime, . . 5-7 



Sulphate of magnesia, . . 21-6 



22(j-l 

 Or, lastly, supposing that the sulphuric acid exists in the state 

 of sulphate of soda, the proportions will be 



Muriate of soda. .. 15.0-3 grains. 

 magnesia, . . 35'r, 



— inne. 



Sulphate of soda, .. 2.3 -(i 



226-1 

 Titese proportions differ somewhat, though not very materially, 

 from those found by the othe.- modes of analysis. Tiie principal 

 diftVrer.ces consist in the (juantity of magnesia and of sulphuric 

 acid being rather larger. This is cviden'tlv to he ascribed to the 

 ■Jtiodo.^ of detecting sulphuric acid ijy barytes, and magnesia by 

 fihosphoric acid and ammonia, being so perfect, that the entirie 

 quantities of them are found ; while,^n the other modes, from the 

 difficulty of effecting th.- entire separation of salts from each 

 other, a .small portion of sulphate of magnesia, or of nnuiate of 

 magnesia and sulphate of soda, had remained with the muriate 

 of soda: and tliough subcarbonatc of soda was employed to de- 

 compose tl'.cm, this decomposition is not altogether perfect. In 

 tlie mode of analysis, too, by rCagents.the presl'iice of water in the 

 products can !)c more completely excluded ; and to this, probably, 

 IS to be ascribed the absolute quantitv of saline matter being 'a 

 •little less according to this analysis, than it is in the others *. 



Of 



■ In anotlier iinalysiii of 8ca-u-atcr, in which subcarbonate of ammonia 



WM Cii.ploycd to precipitate tlio niairncsk, a solution of it being :u!(le(I to 



^ - the 



