factors is from the triplet part ($\sim \tau^3$). The terms linear in $\Omega$ contribute to the electric isovector and to both magnetic form factors. As can be easily checked directly from () and (), the contribution from the real part of the action to both the isoscalar electric form factor and the isoscalar magnetic one is exactly zero. This means that these form factors originate from the imaginary part of the action and they will not be regularized. Table 1 lists terms contributing to a given form factor. In the last column we explicitly indicate which form factor should be regularized.

[Table 1.]{} Terms of the effective action contributing to different electromagnetic form factors.

$$\vbox{\offinterlineskip
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\halign{&\strut\hfil#\hfil\quad
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\noalign{\vskip3pt}
& quantity & $A_{\mu}$ & $\Omega$ & $\hat Q$ &
$2^0$-order FSD & $V_{\omega}$ & regularized &\cr
\noalign{\vskip6pt}
\noalign{\hrule height0.5pt}
\noalign{\vskip6pt}
& $G_E^{T=0}$ & $A_4$ & $\Omega^0$ & $\sim \hat 1$ & {\sc no} &
{\sc no} & {\sc no} &\cr
\noalign{\vskip6pt}
& $G_E^{T=1}$ & $A_4$ & $\Omega^1$ & $\sim \tau^3$ & {\sc yes} &
{\sc yes} & {\sc yes} &\cr
\noalign{\vskip6pt}
& $G_M^{T=0}$ & $A_k$ & $\Omega^1$ & 