whose point Q is shown likewise in figure 2' 

 For: 



z_ » 0.27j 

 H 



0o27 x Oo3l6 = Oo853 mo > 2h - 0.45 



we obtain the same limiting slope i - l/3 and the same batter 

 t/z = 3 by which its representative point Q will be the same as 

 that we have just obtained „ 



The mean abscissa corresponding to the point p and to the 

 points Q, the number of experiments of each of which approximate 

 those of Pj will be; 



t = 2,16 +3+ 3 - 2,72 



which determines for us the point E perfectly centered likewise 

 in the group of points of Figure 2' „ 



This shows definitely, we believe , that the formula for the 

 limiting slope: 



is very acceptable, and even though its application could be 

 refined even more, we estimate that what has been done gives a 

 sufficient approximation for the majority of practical cases 

 Perhaps it should be repeated once again that in the methods and 

 formulas that we re commend for the maritime technician we do not 

 pretend to utopian theoretical exactitudes*, but acceptable 

 practical approximations „ 



It should be noted here that the experimentation made for 

 the discontinuous batters is acceptable and as has been shown., 

 all of it fulfills the condition determined in our report to the 

 Congress that the depth in the extreme of the batter Hg = z 

 should be equal or greater than the height 2h of the wave,, that 

 is He = z ^ 2h» 



Summarizing 3 the results of the interesting experimentation 

 of Delft have confirmed ours, contained in the cited report to the 

 Congress, according to which the batters of complete reflection 

 and complete breaking, whose mean is the limiting slope between 

 both;, are practically in the relation of two to one, so that 

 having obtained the limiting batter, or its inverse the slope, 

 by means of our formula, it suffices to multiply it or divide it 

 by 3/4. or 3/2 to obtain each one of them. 



11 



^% 5 



