as a function of p. 



Formiaa (32) follows from (3I) when putting 2aA = §» and 

 eliminating the phase velocity of the wave by 



e'2 = |A.. (33) 



In fully developed sea, where A = D, and where the "p^*-wave" 



(B *,6 *) and the "8 -wave" (the "sea") (p„,5„) (see Chapter I) are 

 "^rn ' ni in m in 



fully developed, we have with (29) and (32), considering (25) and (17) 



* 



Y^(PJ + s'TT n e"^Pm(l - pj^ . g*^ ^ e"^Pm*(l - ^^*)^. (34) 



Since p = f (v) in the fully developed sea, it is to be expected 

 that M is only a function of wind velocity, M(v), whereas in the 

 case of not fully arisen sea, M depends also on the stage of wave de- 

 velopment. With reference to Chapter I, 2, we put ^^ = 1.37. 



From (34), or with the aid of an empirical formula for the ef- 

 fective stress given in a previous paper [13] » 



r,„ = P'k(v)v2, Wv)=i5(i^)'^', (35) 



which agrees with equation (24), when putting p^^ = f(v) as given by 

 equation (60) in this paper, we get 



From this expression, and with p' = 1.25*10"^, g = 980, n = 0.1075 

 and r = I.667 



M = 0.1825.10''^ v^^^ [cm"-"- g sec"^]. (36) 



The coefficients of eddy viscosity computed by this formula are 

 of the same order of magnitude as the values of the "Austausch- 



68 



