h>/ Metals under the Influence of -Alpha Rays. 

 FLr. 1. 



909 



CEMTIMETERS 



capacity in making the electrical measurements. The 

 following form of apparatus was used (fig. 1). 



A piece of thin aluminium leaf JE, •()(!4xlO _4 cm. 

 thick, is stretched over the flat brass ring D. which has 



