216 Flint — liesearches upon the Complexity of l^ellurium. 



aration was effected l)y docantation of the liquid from the 

 less soluble portion. Both fractions were then evaporated 

 to dryness and ignited to dioxide. Carefully weighed equal 

 quantities of these samples were dissolved with equal amounts 

 of hydrochloric acid and diluted witli equal amounts of boiling 

 water. After standing for some hours, the precipitates were 

 collected upon Gooch crucibles and washed, dried, and weighed. 

 It was found that the fraction more insoluble in nitric acid 

 gave about G"5 per cent more dioxide, by the hydrolysis from 

 hot water, than the other, or more soluble, portion. It Avas 

 proved that this difference was not due to the presence of 

 impurities detectable by careful qualitative analysis. 



A similar difference in solubility (in nitric acid) was noted 

 in a i-ecrystallization of part of the basic nitrate prepared froip 

 the 150-gram portion of purified tellurium described in Part I 

 of this paper. After the whole of the sample taken had been 

 finally gotten into solution, the greater part was thrown out, as 

 basic nitrate, by sufficient concentration, and the liquid from 

 which it had separated decanted from the crystals. These 

 crystals were washed, and dried in the heater, as usual. The 

 mother liquor was then evaporated to dryness and the residue 

 ignited almost to redness, whereupon it developed an orange- 

 red color and became distinctly crystalline in texture. The 

 color was proved not to be due either to iron or to selenium, by 

 the ordinary tests. 



Basic nitrate experiments performed upon the less soluble 

 fraction, exactly as described in Part I, furnished the data 

 (con-ected) of the accompanying Table V. 







Table V. 







STeOa.HNOs 



2Te02 



A-tomic weight 





taken 



found 



of tellurium 



Exp. 



gms. 



gms. 



gms. 



1 



1-98132 



1-65281 



126-53 



2 



] -34204 



1-11947 



126-48 



3 



1-36589 



1-13945 



126-55 



4 



1-17057 



0-97655 



126-59 



5 



1-07610 



0-89765 



126-50 



6 



0-98468 



0-82145 



126-57 



7 



1-67119 



1-39396 



126-44 



8 



1-53443 



1-28006 



126-56 



9 



2-53215 



2-11231 



126-53 



lu 



2-46437 



2-05543 



126-37 





16-12274 



13-44914 



126-51 (Mean) 



The mean value found in this table, 126-5, is identical with 

 that given by Browning and Flint as referred to in Part I. It 



