The Corlis Steam Engine, 1876.
© Science Museum / Science & Society Picture Library
Chromolithograph from 'Treasures of Art, Industry and Manufacture Represented in the American Centennial Exhibition at Philadelphia, 1876'. The Double Corlis Engine was a great succes at America's Centennial Exposition of 1876, which was held in Philadelphia, Pennsylvania, United States. Designed by George Corlis of Rhode Island, the engine powered all the exhibits in Machinery Hall, where it stood on a platform 56 feet acros. Its two cylinders spun a flywheel 30 feet in diameter and weighing 56 tons to produce 1400 horsepower.