68 Mr. kir wan’s Experiments and Obfervations on 
Of the affinity of the vitriolic acid to phlogifon in fulphur . 
According to the principle above laid down, this affinity i* 
in a compound ratio of the quantity of phlogifton taken up by 
j oo grs. of the vitriolic acid and of the denlity it acquires by 
its union with the acid. Now ioo grs. of fulphur contain 59 
of acid and 41 of phlogifton, and the lpecihc gravity of lulphur 
is 2,344; therefore, the lois of weight of lulphur in water = 
= 42,66 grs. the lofs of weight of the acid part of the 
100 
2,344 
fulphur is = 1 3,96 grs. ; therefore, the remainder of the 
lofs of ffilphur is the lofs of the phlogiftic part =28,70 grs.; 
then the abl'olute weight of the phlogifton being 41 grs. its 
denlity will be 1,429 = ; and lihce 100 grs. of vitriolic acid. 
take up 70 of phlogifton its affinity will be 1,429 x 7 0= 100. 
But if the affinity of the vitriolic acid to phlogifton in fulphur 
had been fought in the fame manner with the affinity of metallic 
calces to phlogifton, the quantity would be the fame, though 
the expreffion of that quantity would be different, as relating 
to a different ftandard ; for by that method the affinity would be 
directly as the denfity of the phlogifton, and inverlely as the 
quantity of vitriolic acid contained in 100 grs. of fulphur, that 
is, — — ,024 ; therefore, this expreffion anfvvers to, and is 
equivalent to the former, viz. 100. By this means I formed 
the quantities exprefled in the third column, which are homo- 
genous to thofe which exprefs the affinities of acids to their 
balis. Thus, the affinity of the calx of gold to phlogifton is 
1041, for 71,024 . 100 :: ,2.5 . 1041, &c. 
The 
