[ ^76 ] 



If the given fp. grav. of the acid liquor be tabular the quantity 

 of real acid in loo parts of it is apparent, and confequently the 

 quantity of fuch acid liquor containing the required quantity of 

 real acid, is eafily found by the rule of proportion. But if the 

 given fp. grav, is extratahular the quantity of real acid in loo parts 

 of the acid liquor muft be fought by the firft problem. 



Problem ^th. 



The quantity of real acid, in a given quantity of an acid liquor 

 being known, and alfo the quantity requifite to faturate loo parts 

 of any given bafis. To difcover the quantity of fuch bafis con- 

 tained in any folution, or in any pow^der, by which the given 

 quantity of acid liquor is faturated. 



If the bafis be fingle (that is unmixed with any other bafis to 

 which the acid may unite) or combined only with fixed air the 

 folution is eafy, but if the given bafes be mixed with other bafes 

 combinable with the fame acid, the folution is more complex and 

 varies according to the variety of cafes. 



Problem 8th. 



To find how much of an acid liquor of one fort will hold as much 



real ac'id^ as is held by a given weight of an acid liquor of another 



fort whofe fp. grav. is alfo given : — For inftance, how much vitriolic 



acid will contain the fame quantity of real acid as is contained in 



100 grains nitric acid whofe fp. grav. is 1,3925. 



ift. 



