Nuclear interactions induced by cosmic ray high energy particles have been studied by means of a multiplate cloud chamber at 3185 meters above sea level with liquid scintillator as target material. From the analysis of 18 interactions induced by charged primaries it is found: (i) average primary energy E0=41±8Bev (by Castagnoli formula), (ii) average multiplicity of charged secondaries ns=4.9±0.3, (iii) with x=lgγctgθl the differential angular distribution dN/dx indicates some possibility of theexistence of double-humped shape. This angular distribution has been discussed tentatively along the lines of two-centered model.