273 



Te. 



Mean, 79.711, rb -0239 



Hence Te = 124.709. 



In a single anal^^sis of the dioxide, by reduction with SO,, 2.5489 

 grammes TeO, gave 2.0374 of metal. If we give this experiment the 

 weight of one observation in the synthetic series, the percentage of tel- 

 lurium found bv it becomes — 



79-932, 



-0534. 



Hence Te = 126.494. 



Brauner's best results were obtained from analyses of tellurium tetra- 

 bromide, prepared from pure tellurium and pure bromine, and after- 

 wards sublimed in a vacuum. This compound was titrated with standard 

 solutions of silver, and three series of experiments, made with samples 

 of bromide of different origin, gave results as follows. The TeBr^ equiva- 

 lent to 100 parts of silver appears in tlie third column : 



Mean of all as one series, 103.644, ± .0018 



18 



