The technical development of steam diesel and electric locomotives and the way in which railways operate are covered in detail with specially commissioned full colour diagrams to ensure ready understanding by die lam rar The encyclopedia is a major reference work. The lives of the great pioneers-the Stephensons. George Pullman. André Chapelon and many others-are described in the biographies. Comprehensive tables give information including route lengths, gauges electrification and first lines, on the railways of the world.