1syuzh. - Employees of the laboratory of cereal crops (Lower Volga) - the selection group are conducting experiments on obtaining "hard dry" wheat. 2syuzh. - Operation of a universal machine designed at the Institute of Mechanical Engineering for testing metals (Moscow). 3syuzh. - External and internal view of the wind farm, designed by A. Ufimtsev. 4syuzh. - Aerological Institute in Slutsk. Employees of the institute (among them - Professor P.A.Molchanov) carry out aerological studies using a radiosonde, an automatic stratospheric balloon. 5syuzh. - The torpedo aircraft invented in the United States.