Appendix I. On a Composite Model for the New Particles*

Recently, Nishijima-Gell-Mann's rule 1 l for the systematization of new particles has achieved a great success to account for various facts obtained from the experiments with cosmic rays and with high energy accelerators. Nevertheless, it would be desirable from the theoretical standpoint * The content of this letter was read before the annual meeting of the Japanese Physical Society held in October 1955. A note on the same supject has also been published in Bulletin de L' academie Polonaise des