THE EFFECT OF WAVES UPON A TAFFRAIL LOG. 127 
curves of speed and R. P. M., with and against the wind, and the mean 
curve, are given on Plates 61 and 62, and from the tape record, the log speed 
on each run was taken. The results are given in Table II. 
Fic. 7. : 
TABLE II.—U. S. R. C. GresHam.* 
V from Ratio Vcurve 
mean curve. Viog. 
*For dimensions see Table IV. _ 
{Speed accidentally_altered during run. 
{Log disconnected. 
