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Compound steam locomotive. Compound steam engines increased efficiency by expanding steam in two or more phases rather than just one. Commercially applied to locomotives in the 1860s, several European and US engineers developed designs. This is a French design, for the Chemin de Fer du Nord railroad company, from the period 1885 to 1890. Artwork from 'Chemins de Fer, Automobiles' (1911) by French civil engineer Max de Nansouty (1854-1913), part of the 'Les merveilles de la science' series of 1867-1891 by Louis Figuier.
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