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Large discrepancy of the p-wave phase shift data $\delta_{1}(\nu)$ of the$\pi$-$\pi$ scattering from those of the dispersion calculation is pointed out.In order to determine which is correct, the pion form factor $F_{\pi}(\nu)$,which is the second source of information of the phase shift $\delta_{1}(\nu)$,is used. It is found that the phase shift obtained from the dispersion is notcompatible with the data of the pion form factor. What is wrong with thedispersion calculation, is considered.Comment: 7 pages, 7eps figure

Proposal to observe the strong Van der Waals force in e + ē → 2π