1Petition of Henry Voigt to the Patent Board, [before 10 August 1791] (Jefferson Papers)
[ Before 10 Aug. 1791 ]. He requests a patent for his “easy method of propelling Boats and other Vessels through the water by the power of Horses or cattle, whereby their strength may be applied nearly as well as that of a man at an Oar, which of course will reduce the price of inland navigation nearly as much as the labour of Horses is cheaper than that of Men.” Tr ( DP : Scientific Library,...