[ ^i8 ] 



Application. 



100 grs. of the vitriolic acid 1,85c contain 79,14 grs. per cent, 



of real acid as already feen ; then if there were no water in the 



compound its weight would be 79,14 + 55 = 134,14 grs. but he 



found the weight to be 160, then the difference or 160 — 134 muft 



be water = 26 grs. 



p 49,47 real vitriolic acid 



! 3+'37 l'™e 

 Then the centenary proportion was<^ ^^ ^c water 



i — 



t I oo,co 

 This proportion we fee fcarcely differs from mine and therefore 

 his felenite was probably expofed to nearly the fame heat. 



Experiment zd. 2 Klaproth, 1 24. 



In this experiment he tells us the felenite was heated to ignition, 

 and conf'-quently we may fee the difference of proportion pro- 

 duced by that heat. 38 grs. of it contained 14,75 of lime; the 

 quantity of acid is not mentioned. 



Application. 



