Wave Resistance: Some Cases of Unsymmetrical Forms. 241 
The difference in the magnitude of the interference effects is sufficiently 
obvious from these curves. The variation in the form of the models shown in 
fig. 1 is considerable, and it would have been of interest to compare forms 
intermediate between those shown for the rear part of the model; but equa- 
tions for such curves led to expressions for the wave resistance which were too 
complicated for numerical calculation. However, it may be inferred that for 
any case in which the lines of the model are smoothed out in this manner 
there will be a very considerable reduction in the magnitude of the interference 
effects. 
Harrison anp Sons, Ltd., Printers in Ordinary to His Majesty, St. Martin’s Lane. 
248 
