L  The  eross-aection  nnder  its  proof  streaa  Divide  &e  proof
stress  ( /^)  bj  the  distance  of  the  most  severely-strained  paxttxdei
from  the  neuiral  axis,  and  bj  the  modnihis  of  ekstidtj;  the
quotient  will  be  the  proof  ewrotxtwn;

r~l&tfi

II.  The  bending  mooMot  given.  Sivicte  tiM  beading  moment
\)j  tb«  moment  of  inertia  of  the  giren  croes-wctioD  (see  Artide
4S7,.  fag*  513),  and  hy  the  modulw  ot  eheticity  of  the  BiatenJ.
