386 



m.=- 



Figure 3 - High-Speed Photographs of a Gas Globe from 

 a Charge Fired just under the Free Water Surface 



The charge was fired 1 inch under the surface of the water. In Photograph 2 part of the gas 



has vented throijgh the water surface. In Photographs A to 9 the lower part of the globe is 



moving downward. More gas appears to be venting through the surface on the second expansion 

 shown in Photograph 7. 



