Smithsonian Report, 1925. — Matignon 



Plate 3 



1. Capsule of Radium Bromide 



Photograph made iu a dark room by the radiation emitted by radium. 

 Diameter of capsule, 350 mm. 



2. Capsule of Radium Bromide 



rUotograph made in a dark room by the radiation emitted by radium. 

 Diameter of capsule, 350 mm. 



