 They were also commonly retro-fitted to existing Newcomen engines (the so-called "pickle-pot" condenser).There are examples of Newcomen engines in the Science Museum, London, England and the Ford Museum, Dearborn, Michigan US, amongst other places.In 1964 the Newcomen Society of London arranged for a Newcomen engine at Hawkesbury Junction, Warwickshire to be transferred to Dartmouth, where it can be seen working using a hydraulic arrangement instead of the steam boiler.