Celebrating the 220th anniversary of the USSR Academy of Sciences. Opening of the jubilee session, present: L. A. Orbeli, S. I. Vavilov, A. A. Bogomolets, A. N. Krylov, V. N. Obraztsov, V. L. Komarov, A. Ya. Vyshinsky, Kapitsa and others, foreign guests; participants of the session at the Geological Museum. Karpinsky, at the Institute of Chemical Physics, at the Institute for Physical Problems, in the scientific town of Koltushi, Pulkovo Observatory, at a ceremonial meeting at the Bolshoi Theater.