Wave Resistance of a Spheroid. 285 
speeds were found in the calculations for curve H, but could not be shown on the 
scale cf the diagram. 
The graphs in fig. 3 for the broadside motion are in striking contrast t6 those 
in fig. 2. Here we have increased resistance at all velocities as we go up the 
series of models; the values for E were calculated, but could not be shown on 
the scale of the diagram. It appears from the curves of fig. 3 that a rough 
empirical rule for this series is that the resistance per unit volume of displace- 
ment is proportional to the area of the midship section. 
Harrison anp Sons, Ltd, Printers, St, Martin’s Lane, London, W.C.2. 
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