[ '85 ] 



application. 



Since 1600 grs, of the mixture contained 628,56 real acid, 100 



grs. of it fhould contain 39,28 ; now this quantity of real acid is 



exadly in the table, and correfponds with the fp. grav. 1,3768. 



Then the difference between Hahn's refult and that of my deter- 



. ". 72 



mmations is — . 



1 0000 



3^/ Experiment. 



To the 1600 grs. of the laft mixture Hahn added 800 of water, 

 and when the whole w^s cooled down to the temperature of the 

 air he found the fp. grav. of the mixture 1,2439. Ibid. p. 50. 



Application. 



This mixture weighed 2400 grs. and contained the fame quan- 

 tity of real acid as the laft, namely, -628,56 grs. confequently 100 

 grs. of it contained 26,19; this quantity of real acid is extratabu- 

 lar ; the neareft tabular quantity of real acid is 25,89, which cor- 

 refponds with the fp. grav. 1,2415; though this feems fufficiently 

 near to Hahn's refult, yet I have found it more exadlly by the 

 2d problem. Here D = 0,0095 and D'= 0,89 and d' = 0,3, then 



by the formula d = -p- — we have — — -^ — -— = 0,00-? 2, and the 

 D o,b9 ^ 



lower fp. grav. 1,2415+0,0032 = 1,2448, which differs from 

 Hahn's refult by only — - — . 



lOOOO 



Vol. VII. Aa • Thb 



