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Since 1974, the electroconstructor "Electrical Engineering in the 200th Experiments" has been manufactured by the Leningrad Plant "Leninskaya Iskra". The set is designed for children 12 ... 16 years old and allows you to collect various electrical devices and conduct experiments with them. The set was produced until 1985, having undergone several design options and descriptions. The instruction for the set is well illustrated and has 108 pages. The instruction manual has chapters: 1. Preparatory work. 2. Sources of electrical power. 3. Electrical circuit. 4. Electric lamp and electric lighting. 5. Serial and parallel connection. 6. Magnetism. 7. Electromagnetism. 8. Models and experiments with the use of electromagnets. 9. Electrical measuring instruments. 10. Electric motors. 11. Electromagnetic induction. 12. Models and experiments with the use of electric motors. 13. Electrical communication and alarm.