'A Description of a Water Engine founded on a new Principle for the raising or draining Water out of a Dock, Canal, Mine, Ship's Hold etc...' by Charles Leigh '...and 'tis presumed, in a greater quantity with less Time, Power and Expence than the Engines now in practice for this Use.' Refers to a figure but no figure attached Read to the Royal Society on 8 December 1737 1737