116 THE ATOMIC WEIGHTS. 



Second Series. 



IVi. Ag. Wt. SrBr^. Ratio. 



1.30762 1.49962 114.683 



2.10322 2.41225 114.693 



4.57502 5-24727 114.694 



5.3680 6.15663 1 14.691 



Mean, 114.694 

 Mean of all as one series, 114.689, ± .0012 



For the ratio, measured gravimetrically, 2AgBr : SrBr.^ : : 100 : x, two 

 series of determinations are given : 



First Series. 



IVi. AgBr. Wt. SrBr.,. Ratio. 



2.4415 1.6086 65.886 



2.8561 I. 8817 65.884 



6.9337 4.5681 65.883 



Mean, 65.883 

 Mean of all as one series, 65.884, ± .0006 



For the atomic weight of strontium we now have the subjoined ratios 



(I.) Agj : SrCI^ : : loo : 73.4725, ± -OO48 



(2.) Ag2 : SrC]2.6H20 : : 100 : 123.460, ± .0082 



(3.) Per cent. H^O in SrCl2.6H20, 40.573, zb .0033 



(4.) SrC]2 : SrSO^ : : lOO : 1 15.936, =fc .0040 



(5-) -A-g2 '• SrBrj : : lOO : 1 14.689, i .0012 



(6.) 2AgBr : SrBrj : : lOO : 65.884, dz .0006 



The antecedent values are — 



O =^ 15.879, ± .0003 Br =. 79.344, zh .0062 



Ag= 107.108, ± .0031 S = 31.828, zfc .0015 



Cl = 35.179, ± .0048 AgBr == 186.452, ± .0054 



