Stock Photo - Kingstown and Dalkey Atmospheric Railway, near Dublin, 1845. This was built on the Samuel Clegg Jnr (1814-1856) and Joseph Samuda (1813-1885) system, also used on the Croydon, the South Devon, and Paris and St Germain Railways. The railway operated without locomotives, using air pressure instead to push cars along the rails. In the bottom half of the picture Clegg's valve is shown open (left) and closed (right). From The Magazine of Science. (London, 1845).

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