532 



SMITIISOMAX ^MISCELLANEOLS COLLECTION 8 



VOL. 54 



The weighted mean ol: both serie;^ is nearly 48. 540, ±.0030. TTcneo 

 Gd = 157.24. BraunerV single determination may be negleeted. 



There are also two determinations made by Feit and Przil)ylla " with 

 their volumeti'ic iiiclliod: 



OcUO.,. 

 .3852 

 .395G 



O. 



.05097 

 .05234 



Atomic weight, 

 157.377 

 157.398 



Mean, 157.388, ± .0067 



The three ratios lor oadoliniurn are — 



(1). Gd,(S04)3.8H,0:GdA: :100:48.540, ± .0030 

 (2). Gd2(S04)3:Gd„03: :100:G0.070, ± .0011 

 (3). 0:Gd: : 16: 157.388, ± .0067 



Reducing these ratios with S = 32.0(567, ±.00075, and H=: 1.00774, ± 

 .0001, we have — 



From ratio 2 Gd = 156.677, ± .0117 



" 1 157.258, ± .0154 



" 3 157.388, ± .0067 



General mean, Gd — 157.218, ± .0055 



This final value is near Urbain's determination, which, upon chemical 

 grounds, is probably the best. 



1 Zeitsch. anorg. Chem., 50, 260. 1906. 



