432 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 54 



Brucia cohalticyanide, Co2Cy^o{GoJS^J^ 20^)^^1^.201120. 



Salt. Co. per cent. 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 

 Hence Co = 59.20. 



Strychnia cohalticyanide, G OnCy^^iOo-JI 22^202)^^1 g-SJIoO- 

 Salt. 

 .4255 

 .4025 

 ,3733 

 .4535 

 .2753 

 .1429 



Mean, 4.5705, ± ,005 



Hence Co = 59.10. 



Purpureoco'balt chloride, (7o2(JV2l3)ioC'?e- 



Salt. Co. Per cent. Co. 



.9472 ,2233 23.575 



.8903 .2100 23.587 



.6084 .1435 23.586 



.6561 .1547 23.579 



.6988 .1647 23.569 



.7010 .1653 23.581 



Mean, 23.5795, ± ,0019 

 Hence Co = 59.10. 

 The last series may be combined with Sommaruga's, thus: 



Sommaruga : . . . . 23.827, ± .006 



Lee 23.5795, ± .0019 



General mean 23.6045, ± .0018 



Baubigny's^ determinations of the atomic weight of nickel are limited 



' Compt. Rend., 97, 951. 1S83. 



