TELLURIUM. 275 



First. H 6 Te0 6 to Te0. 2 . 



Loss in Weight. Per cent. TeO. 2 . 



1.7218 .5260 69.451 



2.8402 .8676 69.453 



4.0998 1.2528 69.442 



3.0916 .9450 69.433 



1.1138 .3405 69.429 



4.9843 1.5236 69.432 



4.6716 1.4278 69.437 



Mean, 69.440, .0024 



Hence Te = 126.209. 



Second. H 6 Te0 6 to Te. 



// 6 7><9 6 . Loss hi Weight. Percent. Te. 



1.2299 .5471 55.517 



1.0175 -45 26 55-5'S 



2.5946 I.I549 55-488 



Mean, 55.508, .0068 



Hence Te = 126.303. 



Staudenmaier also gives four reductions of Te0 2 to Te, in presence of 

 finely divided silver. The data are as follows : 



. 7><9. 2 . Loss in Weight. Per cent. Te. 



.9171 .1839 79.948 



i 9721 .3951 79.966 



2-4115 -4835 7995 



1.0172 .2041 79-935 



Mean, 79.950, .0043 



Hence Te = 126.636. 



The last series, giving the percentage of tellurium in the dioxide, com- 

 bines with previous series thus : 



Berzelius 80.042, .0050 



Wills, first series 80.015, d= .0410 



Wills, second series 80.028, .0040 



Brauner, synthesis 79. 7 r I , .0239 



Brauner, analysis 79-93 2 , .534 



Staudenmaier 79-95i .004 3 



General mean 80.001, =t .0025 



The very recent determinations byChikashige* were made by Brauner's 

 method, giving the ratio between silver and TeBr 4 . In all essential par- 

 ticulars the work resembles that of Brauner. except that the tellurium, 



* Journ. Chetn. Soc., 69, 8Si. 1896. 



