384 



Figure 1 - High-Speed Photographs of a Gas Globe 

 from a Charge Fired near a Wall 



The charge was fired 6 inches from a rigid vertical wall shown at the left of the photographs. In 

 Photograph 3 the globe begins to move toward the wall. Photograph A shows the peak of compression 

 at the end of the first cycle. After reaching the wall, the globe continues to pulsate on it, as 

 shown by Photographs 5 to 9. 



