  By calculating the contribution of the $\pi-\pi$ three-body force to the
three-nucleon binding energy in terms of the $\pi N$ amplitude using
perturbation theory, we are able to determine the contribution of the different
$\pi N$ partial waves to the three-nucleon force. The division of the $\pi N$
amplitude into a pole and nonpole gives a unique procedure for the
determination of the $\pi NN$ form factor in the model. The total contribution
of the three-body force to the binding energy of the triton is found to be very
small.
