Electrifying the Underground: The Technology that Created London's Tube

It was a public transport revolution. London had led the world in the development of a subterranean railway system. The first sub-surface lines, constructed by the cut-and-cover method, were operated with steam locomotives. In theory the tunnels and stations were ventilated into the outside air, but in practice they became dingy, miserable, smoke-filled spaces. As one early traveller recorded in his journal, 'I had my first taste of Hades today ...the atmosphere was a mixture of sulphur, co...