This casestudy is a historic analysis of the developments that resulted in the electro-motive engines. It shows the range of inventions that started with Volta’s wet cell, Oersteds moving compass needle, Faradays homopolar motor and Surgeon’s electromagnet, the first steps leading to the electro-motor were taken. Contributions from American, British, Danish, French, German and Italian curious minds, created an understanding of the nature of electricity. In the scientific circles people like Arago, Ampere, Davy and Wollaston were excited by the new phenomenon. Imitating the steam engine, others like Page, Botto and Magrini created the reciprocal electric engines. A dead-end development trajectory when the rotation-capability of electro-magnetism was explored by Ritchie, Wheatstone and Froment. That was different when the first primitive rotative engines were developed (Farmer, Joule, Du Moncel). Then the first usable electric motors appeared, like Davenport’s (1837) and Von Jacobi’s (1834) train and boat equipped with DC-electric engines made public appearances. But due to the cumbersome batteries this developments did not progress. That had to wait till Wheatstone, Siemens and Varley realized the ‘self-exciting’’ dynamo that made electricity available in abundance. The development of the electric dynamo was the direct result of the DC-motor. It was the reciprocal property of electro-magnetism that made the creation of electricity possible. The cumbersome and expensive battery was replaced by the electricity generating dynamos. In combination with the arc-light they were used in lighthouses, operas and theaters, stations and factories, but also used for powering electroplating plants and electric streetcars. Within a couple of decades the dynamo matured: the era of light and power could develop. At the grand Exhibitions/World Fairs people were flabbergasted by all that novelty. Not only the electric light replaced gaslight, the electro-motor became applied in household appliances (like the washing machine, the Frigidaire). Horse powered street cars gave way to the electric streetcar. An industry manufacturing all those electro-motive engines was created, inventor-entrepreneurs patented their ideas. An industrial bonanza started, resulting in a shock in society: new jobs were created and old jobs disappeared. In the streets an electric infrastructure was bringing electricity to the houses. Locally based Electric Power plants, mainly powered by steam machines, appeared everywhere. The Electric Revolution was there. Even more when the Battle of the Currents between Edison and Westinghouse was won by ‘alternating current’ systems that transported electricity over long distances. ‘Electricity was there to stay and change people’s private and professional life. The book describes the work of the many individual engineers, scientists and entrepreneurs. It places the inventions in the context of Europe in the nineteenth century; the 'madness of times', its wars and revolutions as well as 'the gentlemen of science' and the ‘engineers’ who explored the nature of electricity. Their contributions resulted in several 'clusters of innovations', described in detail (including patent wars, businesses, and applications). Both from the micro-perspective of the individual scientist and inventor, as well as the macro-perspective of their influence on society, the basic innovations are described. The book gives the reader a view on what was the mechanism behind the Second Industrial Revolution that created the foundations for our present society. This book is part of series of books (the Invention Series) that covers the inventions within the General Purpose Technologies that fueled breakthrough technological changes. Other titles include: 'The Invention of the Steam Engine', 'The invention of the electro-motive Engine', ‘The Invention of the Electric Light’, ‘The Invention of the Communication Engine ‘Telegraph’’, and ‘The Invention of the Communication Engine ‘Telephone’’. Commercial versions are available through Amazon.