SULPHUR. 83 



Na^CO-i. Na-^SOi. Ratio. 



1.29930 I. 741 13 134.005 



3.18620 4.26790 133-950 



I. 01750 1-36330 133-985 



2.076S0 2.7S260 133-985 



1.22427 1.63994 133-952 



1-77953 2.38465 134.005 



2.04412 2.73920 134.004 



3.06140 4.10220 133-997 



Mean, 133. 9S5, ± .0055 

 The available ratios for sulphur are now as follows: 



(i.) Agj : Ag^S : : loo : 1 14.8581, ± .0006 



(2.) Per cent. Ag in AgjSO^, 69.205, d= .001 1 



(3.) 2 AgCl : Ag,S : : 100 : S6.4733, ± -OOII 



(4.) Na^COg : Na.^SO^ : : 100 : 133.9S5, zb .0055 



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

 deducible. Calculating with — 



O = 15-879. ±:-0003 



Ag = 107.108, ± .0031 

 CI = 35.179, zb .0048 

 Na = 22.881, zh .0046 

 C = 11.920, zfc .0004 

 AgCl = 142.287, ± .0037, 



we have : 



From (i) .S = 31.82S, zb .0016 



From (2) , " = 31.806, zb .0048 



From (3) " ^= 31.864, zb .0086 



From (4) " = 31.835, zb .0191 



General mean S = 31.828, zb .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. 



