Ship Waves. 471 
By displacing the curves to right or left we could examine the case when the 
smoothing of the lines takes place partly in front of the corner; and for a 
positive discontinuity the curves may be inverted. We may thus obtain, for 
example, some idea of the effect of smoothing out the lines of a sharp-angled 
stern, whether actually or by the equivalent effect of a friction belt. 
Summary. 
An examination, by analysis and by curves, of the changes in wave profile 
produced by replacing a sudden change of slope in the lines of a model by a 
continuous variation of the same total amount uniformly distributed over a 
given length of the model. 
HaRRISON AND Sons, Ltd., Printers, St. Martin's Lane, London, W.C.2. 
366 
