742 Experiments on Certain Elements. [May 13, 



around which the various radicles are grouped in such compounds ; and 

 hence peculiarities in the behaviour of such metals in the elemental 

 form may possibly be accounted for. For the atom of cobalt Professor 

 Werner employs the figure of the regular octahedron. For nickel, 

 therefore, which differs from cobalt in many ways, a different figure 

 must be chosen. This, however, is for the present a matter of pure 

 speculation. 



W. A. T. 



