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John Elder biography

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Scottish marine engineer John Elder developed the marine compound steam engine, which enabled seagoing vessels to save coal and delay refueling.


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Marine engineer John Elder was born March 8, 1824, in Glasgow, Scotland. In 1854 he developed the marine compound steam engine (using both high- and low-pressure steam), which enabled seagoing vessels to save 30–40% of the coal they had been burning and helped make practical long voyages on which refueling was impossible.

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