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3215 grains of it contained 1596 of lime. Then having heated 

 the felenite thus formed to a degree fufBcient to convert lime-ftone 

 into lime, he found it to weigh 3600 grains, and deduding 

 from this weight that of the lime, he found the remainder, v. z. 

 2004- grains to be the weight of the vitriolic acid which was con- 

 tained in 9075 grains of the dilute acid liquor, and confe- 

 quently that the 364.7 grains of it which he had employed 

 in faturating the alkali in the former experiment contained 

 806 grains. 



Here, not to repeat with refpedl to the chalk what I have al- 

 ready fuggefted, I fliall confine myfelf to a Jingk error, becaufe 

 it is manifeft : 



As loco parts chalk (he fays) contain 559 of lime, 3215 grains 

 of it fhould contain 1 596, whereas by the rule of proportion it 

 fhould be 1797,185; then deducing 1797 from 3600, the re- 

 mainder, V. z. 1 803, and not 2004, fhould be the weight of the acid 

 part of the felenite ; and 3647 grains of the dilute acid em- 

 ployed in faturating the alkali fhould contain, by his own ac- 

 count, 722, and not 806 grains. It would ill become me to 

 reproach Mr. Richter with this overfight, as many of fuch have 

 often efcaped my notice in my own calculations, and occafioned 

 me infinite labour in rectifying their numerous fpurious confe- 

 qucnces. 



TABLE 



