1st plot. On the electronic restoration of photographs. Scratches and cracks in the photograph of the cavalrymen. The operator, with the help of a special device of a computer, converts the image into electrical signals and records them on a tape recorder. The machine removes defects. Transfer of the image to photographic paper. Photos showing V. Mayakovsky, N.K. Krupskaya, O.Yu. Schmidt before and after restoration. 2nd plot. About birds in the zoo. Eagle, Venetian cranes, storks in the zoo. Zoo staff collect eggs from nests, put them in a special cabinet, and monitor. Chicks hatch from eggs. 3rd plot. On devices for locking doors with a key. Various shapes and types of locks for locking doors with a key; keys of different sizes. Curly bolts. 4th plot. About Newfoundland dogs. Leningrad. View of a road section. Newfoundland named Archie in the car and by the river. Newfoundlands demonstrate their drowning rescue skills at the training school grounds. Dogs with medals runs across the field.