563 
RIG ALS: 
THE PERIODS, T,, , OF THE DOMINANT GROUPS IN A BAR OF LENGTH L, raows a, 
, 
ATA PointT ABSCISSA 2C, AT THE TimME ( AFTER THE DEPARTURE of AN 
INFINITELY THiN PULSE FROM THE ORIGIN. 
A bad = H 2 T, = ne 4 
X VALUES DERIVED FROM TIMOSHENKOS THEORY. 
| 
7 ae AN ld FLEXURAL VIBRATIONS. 
fe (Exact THEORY.) 
| is 
T 
| EXTENSIONAL VIBRATIONS (1% MODE. 
r 2 2: 
| 
‘f 
4 2-6 2:8 
