  Data are recalled on the relative yields of charged pions,charged
kaons,protons,antiprotons,tritiun nuclei, anti-tritium, He3 nuclei and anti-He3
antinuclei produced at 0 degrees by 200-240 GeV/c protons on Beryllium and
Aluminium targets. A search for the production of long-lived particles with
charges 2/3, 1, 4/3, is described; for negative particle production the upper
limits obtained at the 95% Confidence Level were at the level of 10-11 with
respect to the production of known particles.
