)'B 



pension (Jüt,ius). The j-eadiiigs wore made bv means ot' a telescope 

 and scale; 0.02 millivolt could easily be measni-ed. 



6. As it was very important for ns to get rid of this variation 

 of E. M. F. we tried to find its cause. We thought it might be foujid 

 in the electromotive behavioui' of the cadmium amalgams, which has 

 been studied particnlarly by H. C. Bijl ^). 



Fig. 2 contains his results as far as they play a role in onr in- 

 vestigations. The curves repi-eseut the E. M. F. (ordinates) of cells 

 which are constructed according to the following scheme: 



/asc 



foao 



ioro 



f06Ó 



roso 



fOi^ 



/030 



iOZO 



fOfO 



1000 



990 



9SO 



25 



so' 



76' 



fO 20 JO fyO SO 60 



At. % of cadmium. 

 Fie. 2. 



70 



SO 



90 



Solution of cadmium sul- 

 phate (765.4 gr. Cd SO, Hg, SO, 

 73 H,0 per Litre) 



The abscissae represent atoui per cents of cadmium. 



Qd-amalgam 

 x-at. Proc. 



Hg 



1) Zeitschr. f. physik. Gliemie 41, 641 (1902). 



