204 - 2 - 



Using this up to nt = 0,2 and then usinc; (l) anJ (2) step by step, the curve shown in Figure 4 

 is oDtaincO, 



Comparing with the approximate curve (Figure i) it is seen that the regions of falling 

 velocity (i.e. tension on surface of plate) have disappeared. Also the curve is tenoing 

 reasonaOly satisfactorily to the ultimate value of U viz:- 



^ 



P /n (m + -Ij/OS) = 0.1971 P /mn 



The absence of regions of tension in the example calculated is due to the choice of a 

 pressure nave in which n is not too large. If n had been made large so as to suit small charges, 

 the ripple shown in the apprjx imjtc theory would again appeir. 



