Flint — Researches upon the Complexity of Tellurium. 213 



had been performed. By heating to boiling the filtrate from the 

 eighth precipitate a further sejjaration of dioxide was obtained 

 from this liquid, and boiling for ten or fifteen minutes threw 

 out about 42 grams. Part of this sample was converted to 

 basic nitrate and subjected to the same process of analysis as 

 the previous preparations, the results being recorded in Table 

 III. 



Table III. 



After Eight Fractionations. 



(From filtrate.) 



Exp. STeOa.HNOa taken 2Te02 found Atomic weight 



grms. grms. of tellurium 



1 2-12253 1-76842 125-36 



2 2-51320 2-09413 125-45 



8 3-Y6225 3-13447 125-32 



4 3-88080 3-2333t) 125-36 



12-27878 10-23038 125-37 (Mean) 



Fraction ten consisted of but twenty-three grams of dioxide. 

 Since the fractioning process had reduced the quantity of 

 dioxide from over 600 grams to a little more than twenty, it 

 seemed possible that the limit might have been reached. 

 About fifteen grams were consequently transformed to basic 

 nitrate, in two separate preparations. The purpose of this was 

 to eliminate, if possible, the objection that this lowering of the 

 atomic weight might be due to lack of constancy of composi- 

 tion of the basic nitrate. The first sample, tlie data of whose 

 analysis by the basic nitrate method (applied exactly as 

 described for the preceding preparations) are given in experi- 

 ments one and two of Table IV, contained about five grams ; 

 the second, experiments three to seven, sixteen grams. 



Exp. 2TeO 



1 



2 



3 



4 



5 . . 



6 



7 - 



Table W. 





After Ten 



Fractionations 



. 



O2.HNO3 taken 



STeOs found 



Atomic weight 



grms. 



grms. 



of tellurium 



2-06311 



1-71688 ' 



124-25 



2-18903 



1-82172 



124-27 



3-56161 



2-96446 



124-42 



2-99821 



2-49537 



124-37 



2-86977 



2-38824 



, 124-27 



2-47403 



2-05898 



124-31 



4-85363 



4-03943 



124-32 



21-00939 



17-48508 



124-32 (Mean) 



