| 11. | Significant maintenance difficulties appeared, particularly with uneven forces wear on the crosshead guides.
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| 12. | The air pumps were driven from each crosshead.
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| 13. | All screws are of the crosshead variety.
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| 14. | The crossheads are of the slipper pattern.
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| 15. | Air pumps were driven from LP crosshead.
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| 16. | This has a trunk guide so the crosshead is equally supported for either direction of rotation.
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| 17. | Air pump driven from LP crosshead.
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| 18. | Air pumps driven from each crosshead.
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| 19. | "Henry Eckford "'s compound engine was of the vertical crosshead type.
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| 20. | The crosshead became part of the piston, and there was no longer any piston rod.
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