1syuzh. - Workers of one of the enterprises of Rostov-on-Don during the process of regeneration of burned out light bulbs. 2syuzh. - Laboratory experiments on smelting metal in a high-frequency induction furnace, designed by Professor Vologdin. Installation of a furnace at one of the enterprises. Smelting metal (Leningrad). 3syuzh. - Laboratory experiments in the manufacture of shatterproof glass (triplex). Testing it for strength. 4syuzh. - Model of a single-rail high-speed underground metro road, designed by engineer Kearney (Australia).