It is remarked that the forward dispersion relations for $K^{\pm }$-nucleon scattering offer a determination of the "strong interaction parity" of the $K$ meson. At present, the sign of the parity, determined in this way, depends on one uncertain experimental datum: the sign of the $K^{-}-p$ scattering length.

• Received 26 December 1957

DOI:https://doi.org/10.1103/PhysRev.110.572