8 



For water in contact with air at usual atmospheric temperatures, 

 T=0.0051 pounds per foot; Lm{n=0.05Q ft.; C„,in=0.756 ft./sec. 

 When L=3Lmin, the wave velocity given by equation 3 differs 

 from that given by equation 2 by less than 5 percent. The equations 



03 



is 

 o 



SaN03K-l 



apply only to ripples of very small amplitude and no quantitative 

 conclusions may be drawn from them regarding the eflFect of surface 

 tension near the upper limit of the height-length ratio. Since a 

 wave of 1 -second period in deep water has a length of 5.1 feet, it is 

 seen that the radius of curvature is so large in comparison to that 



