[en] The results of study of neutrino (antineutrino) interactions (NI) on the FIAL 15-feet bubble chamber (BCh), as well as the main problems of neutrino investigations are discussed. The NIs on the FIAL BCh were investigated on the filling the BCh with pure hydrogen, the light neon-hydrogen mixture (H₂+20%Ne) or the heavy neon-hydrogen mixture (H₂+65%Ne). The principal methods of the muon identification and determination of the neutrino energy in the events are considered. The new results obtained in other laboratories are analyzed. The energy dependences of event distributions according to the scaling variables in the deep-inelastic NIs are discussed. Diminishing difference between tauN cross sections with the energy increase is the most important result. The analysis of the data on the yield of neutral strange particles of the V⁰ type (K, L-particles) at the neutrino energy from 1 to 30 GeV has shown the yield increase from (3-4)% at low energies to 16% at 25-30 GeV. The analysis of multiplicity of hadron production in the NI with hydrogen and the comparison with the electron production data lead to the conclusion that the average number of charged hadrons in the wide class of interactions does not depend on the interaction nature and depends only on the mass of the produced hadron system. The search for μe-pairs in the NI has shown that at the neutrino energy of 2.5 GeV the yield of the (μ^-e⁺ν⁰+μ^-e⁺) events is about 10^-4. The potential of the NI investigations with the BCh is noted, the main directions of the investigations being singled out