Elements Of Construction For Electro-Magnets is a book written by Theodore Du Moncel in 1883. The book provides a detailed description of the construction of electro-magnets, which are devices that use electricity to generate a magnetic field. The author discusses the various materials that can be used to create electro-magnets, including iron, steel, and copper. He also covers the different types of coils and windings that can be used to create these...