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TOWER GROUP, ENYU ISLAND. A further view 

 of the types of tower installations made to house 

 delicate apparatus used to record the characteris- 

 tics of the blasts. Many of the photographs in this 

 volume and many of the best newsreel views of 

 the explosions were taken from towers such as 

 these. Cameras were installed inside lead-walled 

 vaults, the doors of which were arranged to close 

 automatically after the filming had been accom- 

 plished, thus protecting film from the harmful ef- 

 fects of gamma radiation. Each tower amounted 

 to an extensively equipped observation station.. 



