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EVEN STEPHEN. The sub "Apogon," surfaced but 

 with underwater control weights in place. Subma- 

 rines proved to be useful "instruments" for sub- 

 jection to the enormous pressures created by the 

 atomic bombs, since their hulls are expressly de- 

 signed to withstand high pressures produced by 

 the ocean at great depths of submergence, and 



by exploding depth charges and mines. For Test 

 Able eight submarines were used, all of them on 

 the surface, where destructive effects were ex- 

 pected to be greatest. In Test Baker greatest 

 destruction was expected to result from pressure 

 in the water; for that test, therefore, all subma- 

 rines were submerged, and at various depths. 



