296 



THE ATOMIC WEIGHTS. 



taken in each experiment. The data obtained were as follows ; the last 

 column giving the weight of hydrogen, computed from its volume, 

 yielded by 100 parts of cobalt or nickel : 



Wt. Ni. 

 f .0906 

 .1017 

 .1990 

 A. <{ .0997 

 .1891 



.1859 



.1838 



B. - .1806 



.2026 



C. .1933 

 .1890 



D. -j .1942 



.1781 



Nickel. 



Vol. H in cc. 



153-62 

 172.32 

 337.o6 

 168.93 

 319.86 



314.75 

 311-25 



318.75 

 305.28 



333-81 

 325.93 

 319.77 

 328.15 

 301.09 



Cobalt. 



Vol. H in cc. 

 321.36 

 312.95 

 319-63 

 328.96 



3 2 8.43 

 329.55 

 290.17 



308.97 

 318.60 



3H.73 

 3 5-4o 



Ratio. 

 3.420 

 3.418 

 3-4i6 



3.417 

 3.412 



3.415 

 3.4i6 



3.398 

 3-409 

 3-404 

 3.401 



3-412 

 3.408 

 3-410 



Mean, 3.411, .001 



Ratio. 



3-395 

 3.398 

 3-397 

 3-398 

 3403 

 3-401 

 3-401 

 3-404 

 3.405 

 3.410 

 3.407 



Mean, 3.4017, .0009 



The weight of the hydrogen in these determinations was doubtless 

 computed from Regnault's data concerning the density of that gas. Cor- 

 recting by the new value for the weight of a litre of hydrogen, .089872 

 gramme, the ratios become: 



For nickel 3-42H, .0010 



For cobalt 3.4112, =b .0009 



Some time after the publication of Russell's first paper, but before the 

 appearance of his second, some other investigations were made known. 



