116 



The cell was made as in Fig. I. the electrodes being made of cad- 

 mium amalgam. -By placing the two ends in water baths the two ends 

 can be liept at a constant small difference of temperature, thus keeping 

 the e. m. f. constant. The following data and curve (Fig. II) are for a 

 cell filled with 10 per cent, solution of cadmium sulphate. 





^•JOO S-000 



/0006 



Length of cell U9 cm. 



Cross section 277 sq. cm. 



1 



Box Resistance. Galv. Def. Def. 



ohms. 5.99 .166 



5000 4.68 .213 



9000 390 .256 



From curve Re 4- Rg =^ 17470 ohms. 

 Rg = 225. 



Sp. Resistance p 



17470 X -277 

 99. 



48.3 ohms. 



