Inclined planes for use on canals. 1800. Top:

Inclined planes for use on canals. 1800. Top: Double inclined plane Middle: Upper works of single inclined plane. Bottom: Upper works of medium inclined plane powered by a water wheel. The inclined plane could be used to transfer vessels, in this case tub boats, often of iron, from one level of a canal to another without the expense of a flight of locks which could make the building of a canal uneconomic. Plate based on engravings in A Treatise on the Improvement of Canal Navigation, Robert Fulton, (London, 1796). Engraving

1796 Canals Expense Fulton Improvement Inclined Inland Level Locks Often Transfer Treatise Uneconomic

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