Smithsonian Report, 1937. — Lane 



Plate i 



-:i6u»mai3t^*«a^ 



::'ZT''.;grfcSii:^r-- ^-*- - 



i^U^kiiih 



mSaaassmi^ 



After Bradley 



1. Variation in Yearly Bands (Varves). 

 Fine-grained limey sandstone of upper i)art of Green River formation. Enlarged 27 diameters. 



2. Radiograph of polished piece of Great Bear Lake Radium Ore 

 (pitchblende) made by its own action on a photographic plate. 



Six days' exposure. 



