Again, in 1701, two gentlemen (whose names are not worth recording) proposed to have “vanes or sails arranged between two wheels on the same shaft,” the “sails or float-boards being so contrived as to be able to play in a given space, being fixed perpendicularly on the wheel and fastened by a cord or otherwise, so that when the wind blows from any quarter three-fourths of the sails catch the wind, and, by driving the wheel round, the sails, which are forced against the wind, come up edgeways, but when past the centre immediately turn to the breeze, and by that means produce a continued circular motion.”[31] [Sidenote: Phillips and his windmill.] About the same period another invention, of a somewhat similar sort, was published by a person named Phillips, who proposed to erect between two tall masts “a windmill of altogether an original description.”[32] One is reminded when reading these grave proposals, of Don Quixote’s ludicrous exploit with the windmill, and considering the care Mr. Phillips seems to have bestowed upon his invention, he must have been quite as enthusiastic and apparently as serious in his proposal as the hero of Cervantes in his knight-errantry. But all these schemes, and many others too numerous to mention, however impracticable and absurd some of them may have been, had the germ of the great invention more or less developed. [Sidenote: Papin and Morland.] During Papin’s residence in England, 1681, he witnessed one of the interesting experiments made on the Thames, in which a boat constructed from the design of the Prince Palatine Robert, fitted with revolving oars or paddles, “left the King’s barge, manned by sixteen rowers, far astern in the race of trial.” This experiment suggested to him, in 1688, the idea of an engine, and led to his proposal of using gunpowder to create a vacuum under a piston, so that the piston would descend. Two years afterwards, 1690,[33] Papin describes a steam cylinder, in which a piston descends by atmospheric pressure when the steam below it is condensed, and among the subsequent uses of such a machine he mentions the propulsion of ships by “Rames volatiles” or paddle-wheels, the axles of which, he thought, might be turned by several of his cylinders acting alternately by the rack work shown in his drawing.[34]