561 
FIG. A.L. 
PHASE VELOCITY, ©, OF EXTENSIONAL ANO FLEXURAL WAVES OF 
WAVE-LENGTH JL IN CYLINDRICAL BARS OF RADIUS @. 
£,* VELOCITY OF O1STORTIONAL WAVES. 
t= VELOUTY OF RAYLEICH SURFACE WAVES. 
ee P 3 Ss - 0-29. 
X VALUES DERIVED FROM 
Timo SHENKO'S THEORY. 
