MARK SYKES / SCIENCE PHOTO LIBRARY MARK SYKES / SCIENCE PHOTO LIBRARY
Galloway steam boiler. Cutaway artwork of the Galloway steam boiler, showing the internal system of tubes and pockets. Fuel, such as coal, was added at left through the doors. The burning fuel turned water to steam, and the steam was used to heat a factory or home. Valves are seen along the top of the boiler. Steam boilers were designed to circulate heat, rather than produce motion as steam engines did. Galloway boilers were built by W. & J. Galloway and Sons, a British engineering firm based in Manchester in the 19th century.
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