The book tells about the life and work of one of the creators of electric arc welding of metals, Russian inventor and scientist Nikolai Gavrilovich Slavyanov. Not limited to theoretical research and laboratory research, Slavyanov for the first time in the world used electric arc welding in shipbuilding. The works of this pioneer of applied electrical engineering, highly appreciated by domestic and foreign specialists, are widely used in our time - the vast majority of welding work is carried out according to the method developed by Slavyanov.