(d) Data 



T - 0.8 sec; H = 0.25 mj 2L = 2.3 m; 2L = 9.3; 1 - 20; 



H h 



h = 2„3 = -0.0575 

 2 x 20 



m„ 3 





we obtain: 







i = 4 

 0.B 



./ 0.0575 

 V 9o8l 



- 0.383 



that is s the batter: 







t = 1 



= 2.61 





H 0o3£ 









The mean value of the limiting batters obtained is then: 



t = 1.7 6 ♦ 2.03 4- 2.26 + 2.61 = 2.165 

 H A 



As has already been indicated in our report , including ex- 

 perimental verification, the theoretical limiting batter should 

 correspond, very approximately, to the mean value between the batter 

 of complete breaking hi = or of complete reflection hi = 1, that is 



h~ h~ 



ought to logically correspond to the value h]_ _ q + ]_ _ q.5. 



h~ ~~ 2 



With this ordinate, hi = 0.5 S and the abscissa obtained, t = 

 h~ H 



2.165 j we fix the point P in Figure 1' which, coinciding with great 

 exactitude with the center of the collection of experimental points, 

 demonstrates once again the degree of exactitude of the formula 

 employed. 



Even more interesting are the results obtained by analogous 

 procedure on the discontinuous batters, whose graph, as is already 

 apparent in the report presented in Grenoble (Figure 2), is so 

 disordered and its points so dispersed that it is difficult for one 

 to deduce from it reliable or dependable conclusions. 



The principal reason for this dispersion is that the variable 

 adopted for the abscissas t__, is even less acceptable, in these 

 cases of discontinuous 2L batters, by virtue of the real 

 batter of the wave breaking slope being now 



t = t_x 2L 

 z 2L z 



