304 



THE ATOMIC WEIGHTS. 



•5756 



•56765 



.5663 



•5449 



• 3'74 



.3148 



.4976 



.4961 



•9913 



•4538 

 .4451 

 .4438 

 .4272 

 .2491 

 .2467 

 •3904 

 .3891 



78.839 

 78.411 

 78.368 

 78.400 

 78.481 

 78.367 

 78.457 

 78.432 



.0166 



Mean, 78.557, zb .0319 



To these data of Kriiss and Schmidt the remarks ah-eady made con- 

 cerning Remmler's work seem also to apply. The variations appear to 

 be fortuitous, and not systematic, although the authors seem to think 

 that they indicate a compositeness in that substance whicli has been 

 hitherto regarded as elementary nickel. There is doubtless something 

 to be said on both sides of the question ; but if Kriiss and Schmidt are 

 right, all previous atomic weight determinations for cobalt and nickel 

 are invalidated. In view of all the evidence, therefore, I prefer to regard 

 their varying estimations as affected by accidental errors, and to treat 

 their means like others. On this basis, their work combines with previ- 



