304 



THE ATOMIC WEIGHTS. 



2. 



3- 



5- 



Ni. 

 .5870 

 6011 



.7988 



9913 



.9868 



.4093 

 .7216 



394 



6. 



.4415 

 .4350 

 7752 



7- 1 .7667 

 .7558 

 4555 

 445 6 

 .44415 

 4423 

 2508 

 2467 



4538 

 .4451 

 .4438 

 .4272 

 .2491 

 .2467 

 .3904 

 .3891 



Oxidation qf Ni. 



NiO. 



7471 



7659 



.7606 

 1.0175 

 1.2631 

 1.2582 



.5193 

 .9200 

 .4052 

 .6518 

 5 62 3 

 555 6 

 .9831 



1 



10. 



( .3918 

 1.3891 



.9639 



5756 



.56765 



.5663 



.5642 



.3174 



.3H8 



.4976 



.4961 



78.839 

 78.411 

 78.368 

 78.400 

 78.481 

 78.367 

 78.457 

 78.432 



Mean, 78.444, =h .0166 



Per cent. Ni. 



78.571 

 78.372 

 78.359 

 78.506 

 78.482 

 78.429 

 78.818 



78.435 

 78.825 

 78.414 



78.517 

 78.294 



78.853 



78.515 

 78.411 



79-135 

 78.499 

 78.43 

 78.394 

 79-015 

 78.367 



78.738 

 78.432 



Mean, 78.557, .0319 



To these data of Kriiss and Schmidt the remarks already 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 which 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- 



