NICKEL AND COBALT. 299 



thermore, heat was applied from above. The results attained were very 

 satisfactory, and assign to nickel and cobalt atomic weights varying from 

 each other by about a unit ; Ni being nearly 58, and Co about 59, when 

 O = 16. The exact figures will appear later. The cobalt results agree 

 remarkably well with those of Weselsky. The following are the data 

 obtained : 



Brucia nickelocyanide, Ni. A Cy Vi (^C^H^N^O^ & H 6 .10H 2 0. 



Salt. Ni. Percent. Ni. 



.3966 .0227 5.724 



.5638 .0323 5.729 



.4000 .0230 5-75 



.3131 -01795 5-733 



.4412 .0252 5.712 



.4346 .0249 5.729 



Mean, 5.7295, .0034 



Strychnia nickelocyanide, Ni 9 Cy l2 ( C 2l H^N 2 2 \H 6 .8H 2 0. 



Salt. Ni. Per cent. AY. 



.5358 .0354 6.607 



.5489 .0363 6.613 



.3551 -0234 ' 6.589 



4495 - 02 97 6 - 6 7 



.2530 .0166 6.561 



.1956 .0129 6.595 



Mean, 6.595, .005 



Brucia cobalticyanide, Co 2 Cy l2 ( C 2Z H 26 N 2 0^> 6 H 6 .20H 2 0. 



Salt. Co. Percent. Co. 



.4097 .0154 3.759 



3951 .0147 3-720 \ 



5456 .0204 3.739 



.4402 .0165 3.748 



.4644 .0174 3-747 



.4027 .0151 3.749 



Mean, 3.7437, .0036 



Strychnia cobalticyanide, Co. 2 Cy l2 (C 2l H 22 N 2 0,\H 6 .8H. 2 0. 



Salt. Co. Percent. Co. 



.4255 -0195 4.583 



.4025 .0185 4.596 



3733 .0170 4-554 



-4535 -0207 4.564 



-2753 -0126 4.577 



.1429 -0065 4.549 



Mean, 4.5705, =b .005 



