  Within fixed-t dispersion relations the results of new VPI partial-wave
analysis for the multipole amplitudes $M_{1+}^{3/2},E_{1+}^{3/2}$ are
successfuly described, and the resonance and nonresonance contributions into
these amplitudes are separated in correspondence with the interpretation on the
language of diagram approach, dynamical models and effective Lagrangian
approach. The amplitudes $A_p^{3/2}$ and $A_p^{1/2}$ corresponding to the
$\Delta$ contributions into $M_{1+}^{3/2},E_{1+}^{3/2}$ are obtained. They are
in better agreement with quark model predictions than the amplitudes extracted
without subtraction of the nonresonance contributions in
$M_{1+}^{3/2},E_{1+}^{3/2}$. The obtained value of the ratio $E2/M1$ for the
$\gamma N \to P_{33}(1232)$ transition is: $E2/M1=-0.022\pm 0.004$.
