[ '83 ] 



Application. 



Vitriolic acid of this denfity lofes, as wc have feen, ,00043 

 in denfity, by each degree between 44° and 60° ; hence its fp. 

 grav. at 60" fhould be 1,8489 — ,00043 X 16 = 0,0068 = 1,8421, 

 which differs infenfibly from the next lower tabular fp. grav. 

 1,8424, and therefore this may be taken for it. 



The quantity of real acid in 100 grs. of the acid liquor, whofe 

 fp. grav. is 1,8424 amounts to 78,57 per cent, per table, then 800 

 grs. of that acid liquor contains 78,57x8 = 628,56 of real acid, 

 and confequently the 1200 gr. of the mixture contain that quan- 

 tity of real acid, and therefore 100 grs. of the mixed liquor con- 

 tain 52,38 of real acid, which we fee diifers but little from the 

 tabular real acid, 52,68 which indicates the fp. grav. to be 1,5473, 

 and the difference between this and the fp. grav. found by Hahn 

 is inconfiderable. 



However, to obtain a clofer approximation, and to give an ex- 

 ample of the mpde of folving the 2d problem, I ftiall deduce the fp. 

 grav. from the rules laid down for the folution of that problem. 



ifl. The next higher fp. grav. is 1,5473, and the next lower is 

 1,5385, and the difference between them is 0,0088 =:D. 

 Their acid contents are 52,68 and 51,78, and their difference 

 0,9 = D'. 



2d. 



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