Pressure Pulses in Liquid-Bubble Mixtures 



small, for example in the derivation of Eqs. (19) and (21) from (16) and (17), 

 where p is taken equal to p^. 



In fact (a) nVg = 0(1) and (b) nV^ « l have to be considered separately. 

 Inspired by Dr. Benjamin's comments I will publish the theory for both of these 

 cases in the near future. Also other aspects of the comments, as for example 

 the reduction to the Korteweg-de Vries equation will be dealt with in this forth- 

 coming paper. 



135 



