ATOMIC WEIGHTS 491 



0024 



From syntheses Yt = 88.96 



From analyses " = 88.98 



These data of Jones were briefly criticised by Delafontaine/ who re- 

 gards a loAver value as more probable. In a brief rejoinder " Jones 

 defended his own work ; but neither the attack nor the reply needs farther 

 consideration here. They are referred to merely as part of the record. 



By Muthmann and Bohm ^ there is a single determination. 2.46505 

 grammes YUi^O^)., gave 1.19511 YtoO.,. Per cent. Yt.Og, 48.482, and 

 Yt = 89.00. 



In a preliminary note, G. and E. Urbain ■* state that Yt=:88.6, but 

 they give no details. Three determinations by Bodman " are as follows : 



Mean, 49.040, ± .0102 

 Hence Yt = 91.57. 



There are also two determinations by Brill," made with the microbalance. 

 The percentages of Yt^Og in the sulphate are 



48.647 

 48.617 



Mean, 48.632, ± .0100 



Hence Yt = 89.70. 



1 Chem. News, 71, 243. 



^Chem. News, 71, 305. 



3Ber. Deutsch. chem. Ges., 33, 42. 1900. 



^ Conipt. Rend., 132, 136. 1901. 



^Bihang Svensk. Vet. Akad. Handl., 26 (2), No. .3. 1901. 



" Zeitsch. anoTg. Chem., 47, 464. 1905. 



