200 SMTTHSOXIAN MISCELLANEOUS COLLECTIONS 



14C.380 

 146.400 

 146.440 

 146.458 



Mean, 146.419, ± .012 



Hence Pb = 206.96. 



Turner/ in three similar experiments, found as follows 



146.430 

 146.398 

 146.375 



VOL. 54 



Mean, 146.401, ± .011 



Hence Pb = 207.04. 



In these results of Turner's, absolute weights are implied. 



The results of Stas' syntheses/ effected after the same general method, 



but with variations in details, are as follows. Corrections for weighing 

 in air were applied : 



Weight Pb. Weight PhSO^. Ratio. 



141.9925 207.9388 146.443 



148.016 217.6141 146.427 



100.000 146.419 146.419 



200.000 292.864 146.432 



250.000 366.0525 146.421 



250.000 366.0575 146.423 



Mean, 146.4275, ± .0024 



Hence Pb = 206.93. 



Combining, we get the subjoined result: 



Berzelius 146.419, ± .012 



Turner 146.401, ± .011 



Stas 146.4275, ± .0024 



General mean 146.4262, ± .0023 



Turner, in the same paper, also gives a series of syntheses of lead sul- 

 phate, in which he starts from the oxide instead of from the metal. One 

 hundred parts of PbO, upon conversion into PbS04, gained weight as 

 follows : 



iphil. Trans., 1S33, 527-538. 

 = Oeuvres Completes, 1, 390. 



