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heated lo thin fufion, weighed 2544 grains, now at the rate he 

 had before laid down, the 2393 grains of chalk contained 1337 of 

 lime, and deduding this from the falited mafs, he concludes the 

 remainder, viz. 1 207 to have been mere, or what I call real ma- 

 rine acid *. There the error committed in ftating the quantity of 

 lime is important, as from this the proportion of real acid in the 

 fp. of fait is deduced, and applied in calculating its proportion in 

 other muriatic falts. If the chalk contained 50 per cent, of lime, 

 as I ftate it, then 2393 grains of it contained 1196 of lime, and 

 deduding this from the 2544 of falited lime, the remainder, viz. 

 1 348 is the quantity of real muriatic acid contained in that mafs, 

 and confequently that which is contained in 5760 grains of his fp. 

 of fait, and 1000 grains of it contained 234,03 nearly, inftead of 

 209, as he ftates it. 



Seffioti 334/. 



I PASS to this fedlion, as it is here that the defedl of his determi- 

 nation will more clearly appear. In this he tells us, that he fatu- 

 rated 1760 grains of a folution of mild vegetable alkali with 2740 

 grains of the above mentioned fp. of fait, evaporated and fufed the 

 neutral fait thus formed, and found it to weigh 1856 grains, 

 whence, as by his flatement, 2740 grains of that fp. of fait con- 

 tained 



* By an error of the prefs it is ftated in the original that 1 207, 2544 : : 1 000, 1 107. 



