Moscow city. Meeting of the members of the Presidium of the All-Union Society for the dissemination of political and scientific knowledge. Visitors in the halls of the Polytechnic Museum. Academician T. D. Lysenko gives a lecture at the Central Lecture Hall of the Polytechnic Museum. Academician SI Vavilov speaks at the opening of the rural lecture hall of the Ogorodny Gigant collective farm, Kolomenskoye, Moscow Region. Members of the local branches of the All-Union Society for the Dissemination of Political and Scientific Knowledge, doctor A. S. Marchenko, chairman of the Kalinin collective farm in the Moscow region E. M. Skorospelov, worker of the Leningrad Metallurgical Plant named after Stalin A. A. Dmitriev, O. A. Falkova deliver lectures in front of collective farmers, workers, reindeer herders.