[ ^77 ] 



iH. Firft find by the table the quantity of real acid contained in 

 the given quantity of the fecond acid, whofe fp. gr. is given, or if 

 not in the table it muft be found by Problem ift. 



2d. It is apparent that the quantity of the firft acid liquor muft 

 vary with its fp. gr. thus, in the inftance given, as loo parts nitrous 

 add of the fp. grav. 1392 contains 50 parts real nitrous acid, fo 100 

 parts vitriolic acid whofe fp. grav. is 1,520a contains by the table 

 the fame quantity of real acid, v. z. 50 parts, but of the vitriolic 

 acid whofe fp. grav. is 1,800 only 64 parts are. requifite to contain 

 50 parts of real acid, whereas 200 grains are. requifite of the vi- 

 triolic acid whofe fp. grav. is 1,232.0. 



Note, The folution of this problem may hereafter be found of ufe 

 in comparing the quantities and affinities of oxygen in different 

 acids. 



. ' Problem 9th. 



To find the fp. grav. of fuch vitriolic acid as that 100 parts of: 

 it fhall contain the fame quantity of real acid as 100 parts of the 

 nitrous. 



This can be found only by infpedilon on confulting the ta- 

 bles ; an example has been fcen in the laft problem, fo alfo 

 100 parts vitriolic acid 1,3102 contain the fame quantity of real- 

 acid as 100 parts nitrous ^.acid whofe fp. gr. is 1,2687. And. 

 100 grains vitriolic acid whofe fp. gr. is 1,1746 contains the. 



"Vou VII. Z iamc. 



