ATOMIC WEIGHTS 



oiio 



of phenyl telluride, (CgHJoTe. I give his weights, and also the ratio 

 CioHioTe:12C02::100:a;; 



Mean, 188.221, ± .0549 



Hence Te = 126.42, a very low value. This determination only claims 

 a rough approximation to the truth, and is not entitled to much con- 

 sideration. 



Pellini/ in his determinations of this atomic weight, returned to the 

 time-honored methods with the dioxide. First, carefully purified tel- 

 lurium was oxidized by nitric acid. Secondly, tellurium dioxide was re- 

 duced by hydrogen in presence of metallic silver. The data are as 

 follows : 



Oxidation Series. 



0071 



Mean, 79.953, ± .0171 

 Hence Te = 127.625. 



Koethner,'' after some preliminary, but inconclusive experiments with 

 iellurium sulphate and telluric acid, finally resorted to analyses of the 



' Ber. Deutsch. chem. Ges., 34, 3807. 1901. Gazz. Chim. Ital.. 32, 131. 1902. In Gazz. Chim. 

 ItaL, 33 (2), 35, PeUini discusses the possibility of an admixturo in ordinary tellurium, of an 

 element having a higher atomic weight. 



-Liebig's Annalen, 319, 1. 1901. Thesis, Halle. 1901. For a critical discussion of the subject, 

 see Koethner, Zeitsch. anorg. Chem., 34, 402, 1903. See also Seubert. Zeits;h. anorg. Chem., 33, 

 :247; and 35, 206. 



