While these experiments were being made with success in Great Britain, and especially in Scotland, there were not wanting claimants—some of them of somewhat earlier date—to this great invention in other and distant parts of the world. To that of Gauthier we have already referred. In 1776, a countryman of his, Guyon de la Plombiere, suggested the use of a steam-engine for propelling a vessel;[66] and, in that year, the Marquis de Jouffroy states he used, besides the one already mentioned, a steam boat (40 feet long and 16 feet wide) on the Doubs, with propellers moved by a chain from a single cylinder and counterpoise, which opened and closed like louvre boards;[67] applying, in 1780, an engine to his boat with a duck-foot propeller, two cylinders, inclined at an angle, and turned by a chain round a barrel.[68] In 1782, Dixblancs sent to the Conservatoires des Arts et Metiers a model of a steamboat moved by a chain of floats carried on wheels at its sides turned by a horizontal cylinder;[69] and in 1796, it is stated that one Seraffino Serrati, an Italian, had some time previously placed a steam-boat on the Arno, near Florence.[70] [Sidenote: Rumsey and Fitch.] The Americans, as already stated, had, also, at an early period turned their attention to new modes of propelling vessels. In 1784, James Rumsey mentioned to General Washington a project of steam navigation, but, having been refused a patent in Pennsylvania, came to England and succeeded in inducing a wealthy countryman of his own, then resident in London, and others, to disburse the expenses of an experiment, for which he obtained a patent in 1788. The particulars of his plan are given at length by Mr. Woodcroft[71] and will also be found in the Rolls Chapel Reports.[72] They were altogether impracticable for any useful purpose. In 1786, Mr. John Fitch, also an American by birth, proposed to use vertical oars worked by cranks turned by a horizontal steam-engine of which the following is an illustration.[73] [Illustration]