Mr. W. Crookes. 

 FIG. f>. 



[June 11: 



continuance of the experiment.* The exhaustion remained at 

 0'00076 mm., or 1 M. The induction current was kept going for 

 thirty-five minutes, the pole A being negative and B positive. At the 

 end of this time it was seen that most of the cadmium had dis- 

 appeared from the negative pole, leaving the platinum wire clean, no 

 metal being deposited near it, and the molecules appearing to have 

 been shot off to a distance of about J inch. The appearance of the 

 positive pole was very different ; scarcely any of the cadmium had 

 been volatilised, and the condensed metal came almost close to the 

 pole. The tube was opened, and the remaining wires and metal were 

 weighed. The cadmium was then dissolved off the poles in dilute 

 acid ; the residue was washed, dried, and weighed. 



Positive pole. Negative pole. 



Original weight of cadmium 6'00 grs. 6'OU grs. 



Cadmium remaining on the pole . . . 3'65 O25 



Cadmium volatilised in 35 mins. . . 2'35 5-75 



* Cadmium melts at 320 and boils at 860. 



