steam blast

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In George Stephenson
…power and introduced the “steam blast,” by which exhaust steam was redirected up the chimney, pulling air after it and increasing the draft. The new design made the locomotive truly practical.
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In railroad: The Stockton and Darlington Railway
Later he introduced the “steam blast,” by which exhaust was directed up the chimney, pulling air after it and increasing the draft. His success in designing several more locomotives brought him to the attention of the planners of a proposed railway linking the port of Stockton with Darlington, eight…
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