2^0 Ah Analysis of 



that in every case the quantity of lime should be found in the 

 oxalate that is operated on. The above quantity of 21 grains 

 was converted by calcination into carbonate of lime, and this 

 being decomposed by muriatic acid, the quantity of muriate of 

 lime obtained, dried at a low red heat, and weighed while warm, 

 amomited to 183 grains. 



The liquor poured off from the precipitate w'as evaporated to 

 dryness; and to expel the muriate of ammonia formed by the 

 action of the oxalate of ammonia on the muriate of lime, the 

 heat was continued while anv vapours were disengaged, and at 

 the end was raised nearly to redness. The dry mass weighed, 

 while warm, 25 grains. Being dissolved in water, its solution 

 was rendered verv slightly turbid by the addition of muriate of 

 barytes, showing tiie presence of a minute portion of sulphuric 

 acid, A quantity of precipitate was collected, which, when 

 dried, weighed 0*8 grain. Supposing the sulphuric acid of this 

 to have originallv existed in the water, along with the other por- 

 tion of this acid, in the state of sulphate of lime, it gives a pro- 

 portion of that sulphate of 0*5 grain, and of course increases 

 the quantity of it from the 2'6 grains obtained by evaporation to 

 S'l grains. An equivalent quantity must at the same time be 

 subtracted from the proportion of muriate of lime, which may 

 therefore be reduced to IS grains. By evaporation of the liquor, 

 muriate of soda was obtained, weighing, when it had been dried 

 at a low red heat, 24-3 grains. Of this a small portion (0"4) 

 would be formed by the muriate of barytes, which requires to be 

 deducted ; but then the sulphuric acid which existed in the 

 mass, could, after the action of the oxalate of ammonia, and the 

 exposure to a red heat, exist in it only in the state of sulphate 

 of soda, in the production of which an equivalent portion of 

 muriate of soda would be decomposed. The quantity of muriate 

 of soda obtained, therefore, by the evaporation, maybe regarded 

 as the just proportion indicated by the analysis. 



Tlie results, then, by this method, agree very nearly with those 

 by the other; being of solid ingredients in a pint of the water. 



Muriate of soda 24"3 grains. 



Muriate of lime 18 



Sulphate of lime 3*1 



Carbonate of lime 0*5 



45-9 



With a trace of iron. 

 With regaid to both analyses, a small correction is to be made 

 in the proportion of sulphate of lime. The mode of ascertain- 

 ing it, by evaporation, being rather imperfect, I afterwards de- 

 termined it by the more accurate method of precipitation by 



muriate 



