402 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 54 



The ratios for tellurium are now as follows 



(1). TeOo:Te: : 100: 79.9498, ± .0010 

 (2). TeOjtO: : 100: 10.068, ± .0100 

 (3). HoTeOe:3HjO: : 100: 23.550, ± .0083 

 (4). H«TeOa:Te02:: 100: 69.424, ± .0020 

 (5). HeTeO,:Te: : 100: 55.5079, ± .0067 

 (6). Molecular weight H,TeOe, 229.270, ± .0425. 

 (7). 4Ag:Te:: 100: 29.553, ±.0021 

 (8). 4Ag:TeBr,: :100:103.640, ±: .0014 

 (9). KjTeBr«:6AgBr: : 100: 164.468, ± .0324 

 (10). TeBr4:Te: : 100: 28.517, ± .0009 

 (11). TeO,:S02: : 100: 40.136, ±: .0028 

 (12). Te2S07:Te: : 100: 63.978, ±: .0040 

 (13). Te2HNO,:Te02: : 100: 83.. 5000, ± .00047 

 (14). Ci.oH,oTe:12C02: : 100: 188.221, ± .0549 

 (15). AgI:C3H,TeI: : 100: 127.583, ± .0105 

 (16). Ag:C3H,TeBr: : 100: 234.263, ± .0391 

 (17). K,TeBre:2KCl: : 100: 21.7596, ± .00017 



(Heberlein) 



To reduce these ratios we have- 



Ag =107.880 



CI 



Br 



I 



.00029 

 = 35.4584, ± .0002 

 = 79.9197, ± .0003 

 = 126.9204, zt .00033 



N =14 



C =12 



S =32 



K =39. 



0101, 

 0038, 

 0667, 

 0999, 



H = 1.00779, ± .00001 



Hence, 



From ratio 14 Te = 126.418, 



" 2 126.919, 



" 4 127.044, 



" 6 127.223, 



" 5 127.313, 



" 9 127.392, 



" 3 127.451, 



" 13 127.453, 



" 7 127.527, 



" 10 127.531, 



'•■ 8 127.548, 



" 15 127. 5C3, 



" 17 127.572. 



" 1 127.599, 



" 11 127.614. 



" 16 127.722, 



" 12 127.937, 



.0001 

 .0002 

 .00075 

 .0002 



.0820 

 .1579 

 .0114 

 .0425 

 .0247 

 .1350 

 .0583 

 .0046 

 .0954 

 .0045 

 .0063 

 .0247 

 .0064 

 .0066 

 .0113 

 .0422 

 .0163 



General mean, Te = 127.520, ± .0023 



In short, the atomic weight of tellurium is near 127. -3, at least so far 

 as the element is now known. Tlie general mean given above is between 

 the values determined bv Norris and Gallo. 



