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CONDENSATION CLOUD FORMED, TEST ABLE. 



This photograph was taken instants after the bril- 

 liant "first flash" of the bomb. That flash, as 

 previously stated, lasts for but a few millionths of 

 a second. The pictures on this and the succeeding 

 page were made not more than a second or two 



later. The so-called "fireball" is in process of 

 formation, screened from the camera by a wall of 

 mist. This wall, the shape of a hollow inverted 

 hemisphere, is the condensation cloud resulting 

 from expansion of the atmosphere immediately 

 following passage of the shockwave. 



