272 



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Part III. The Mechanism of Stabilization by 

 Gravity and the Sea Bed * 



!• The exact equations of motion . 



In this part, the effects of gravity and of a rigid 

 wall upon the motion of the bubble are considered. The 

 linear momentum s produced by these factors in the course 

 of one complete pulsation of the bubble is calculated. As 

 was shown in part II, it is s which determines the peak 

 pressure produced by the bubble at the time of its minimum 

 size. An equation for determining the best location of the 

 mine can be obtained by setting the momentum s equal to 

 zero. 



33 ft. 



sea. leoel 



Dft. 







B ft 



A ft. 



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