12 GwYTMER, On the Propagatio7i of a Solitary Wave. 



change, and as the effect of the meeting of two waves is 

 figured in Plate 50, just referred to, no doubt the elevation 

 of the waves for which measurements are given is limited 

 to those which could suffer reflection without obvious 

 change. Neither the measurements nor this investigation 

 apply to a wave of height about equal to the depth of 

 the fluid, which Scott Russell describes as becoming 

 " acuminate, finally cusped." * 



Ibid, p. 340. 



