| 1. | Woolf patented his stationary " Woolf high-pressure compound engine " in 1805.
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| 2. | The single-expansion engines were replaced with compound engines that offered higher performance.
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| 3. | Driven by a 1500 hp cross compound engine by George Saxon, 1907.
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| 4. | "Henry Eckford "'s compound engine was of the vertical crosshead type.
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| 5. | Around 1850, compound engines were first introduced into Lancashire textile mills.
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| 6. | Double compound engine s were superseded by more efficient Triple expansion steam engines.
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| 7. | Near the end of the 19th century compound engines came into widespread use.
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| 8. | The first 15 examples were built in 1911 by compound engine.
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| 9. | Five were compound engines, the last one a simple engine ).
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| 10. | Not all engines that use multiple stages are called " compound engines ".
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