Building, interiors of the USSR Academy of Sciences. Academicians: Karpinsky, Kehler, Oldenburg and others at the table. Scientists who came to the celebration, at the station, in the bus, in the car. The building of the hotel "Grand Hotel". Guests enter the hotel. Speaker M. I. Kalinin, A. V. Lunacharsky. Scientist at the telescope at the observatory. The telegraph operator behind the apparatus. Article "For the first time without deficit" in "Krasnaya Gazeta". Scientist in the laboratory. Isothermal map.