SULPHUR. 83 



Na 2 CO 3 . Na 2 SO. Ratio. 



1.29930 I.74H3 134.005 



3.18620 4.26790 133-950 



1.01750 1.36330 133.985 



2.07680 2.78260 I 33-985 



1.22427 1.63994 I33-95 2 



1.77953 2.38465 134.005 



2.04412 2.73920 134.004 



3.06140 4.10220 I33.997 



Mean, 133.985, .0055 



The available ratios for sulphur are now as follows : 



(l.) Ag 2 : Ag. 2 S : : loo : 114.8581, .0006 

 (2.) Per cent. Ag in Ag 2 SO 4 , 69.205, dz .oou 

 (3.) 2 AgCl : Ag 2 S : : 100 : 86.4733, -O 011 

 (4.) Na 2 C0 3 : Na 2 SO 4 : : 100 : 133.985, =fc -OO55 



From these ratios, four values for the atomic weight of sulphur are 

 deducible. Calculating with 



O = 15.879, rt .0003 

 Ag = 107.108, .0031 



Cl -== 35.179, .0048 



Na = 22.88l, .0046 

 C = II.92O, rb .0004 

 AgCl = 142.287, .0037, 



we have : 



From (i) S = 31.828, =b .0016 



From (2) " = 31.806, zb .0048 



From (3) " = 31.864, i .0086 



From (4) " = 31.835,^1.0191 



General mean S = 31.828, .0015 



If = 16, S = 32.070. From Stas' ratios alone, Stas found 32.074; 

 Ostwald, 32.0626; Van der Plaats, (A) 32.0576, (B) 32.0590, and Thorn- 

 sen, 32.0606. Here again Stas' determinations far outweigh all others. 



