will be similar to those of a hypothetical, or victual, wave of 

 equal velocity. That is, the equality v max = v h would have to 

 hold, or in orther words, 



1?t * ygh' »yg A] 

 T ' 2 



The samiperiod being 



n 



♦ L • K, 



g 

 immediately one obtains the height of the virtual wave: 



A' - 2 h» - 2 fK r 2 , 

 LK 



which, introduced in place of A in the formula, thus generalizing 

 it, permits us to calculate the slope or weight of the stones at 

 the depth under consideration, 



Likewise, since 



K =» cth y H , LK » to, 

 L 

 and r in contact with the slope face 



r = Tf " h , 



Sh r H 



one obtains 



A' = 2 1T h 2 



Lo Sh^ v H 

 L 



The inclination of the slope, and other circumstances, could in- 

 fluence all this somewhat, but not varying much from one dike 

 to another, its influence would also remain implicitly in the 

 coefficients vhich, as has been indicated, are determined by 

 direct observation. 



As confirmation of all that has been presented, and has 

 been applied for several years on numerous works that have 

 resisted satisfactorily violent storms, we are going to apply 

 it to the authentic and interesting case of the dikes at Argel 

 on which for the reasons presented, we can soundly begin with: 



