Edmund Leach (Surveyor)
From Graces Guide
1774 Edmund Leach surveyed a line for a Tamar canal. It was to be a contour canal, but with five inclined planes. He later surveyed a line for a Liskeard-Looe Canal which was to have two inclined planes.
1790 Leach published 'A Treatise of Universal Inland Navigations, and the use of all sorts of Mines...' He advocated the use of inclined planes over pound locks. In his design two carriages were to raise and lower boats, the carriages running on boards, rather than on iron rails. The motive power was to be provided by water wheels or tread mills. The book predated Robert Fulton's more famous treatise on the same subject.[1]
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