Captain Du Boisson, a Frenchman and captain of Prince Napoleon’s yacht, “Jerome Napoleon,” has invented a velocipede which runs upon water with great facility. It is composed of two parallel tubes of cast iron, cigar-shaped, connected by iron cross-pieces. In the centre is a propelling wheel, covered by a house or drum, on the top of which the person using the vessel sits comfortably in a sort of saddle, with stirrups. By means of these stirrups and a hand crank upon each side, he gives the wheel its motion, precisely as it is given to a velocipede on shore. The novel craft is easily propelled at the rate of six miles an hour. * * * * * A gentleman of Poughkeepsie, N. Y., has invented and uses an Ice Velocipede, which he propels with astonishing rapidity. The frame of this velocipede is built like those which are commonly used in this city. It has but one wheel, steered with a bar as in the land machine, but armed with sharp points to prevent its slipping. Instead of the wheel behind are two sharp runners, like those attached to the ice boats. * * * * * [Illustration] A Steam Velocipede has also been invented, from which great speed is expected. The cylinders and their attachments to the two driving wheels are not shown. They are placed vertically in front of the boiler, between it and the seat, and connect with cranks on the shaft of the driving wheels. The engraving shows the position of the boiler relatively to the other parts of the machine. The engine is a direct acting compound engine of two cylinders, each cylinder two and a half inches diameter, and five inches stroke. The steering gear consists of an endless chain over a grooved wheel on the engine shaft, and passing over a corresponding wheel fixed between the forked shaft just over the front. The latter grooved wheel is a wide one, and over it passes another chain. This latter chain works round the boss of the front wheel. This arrangement gives power to the front wheel, so that in turning a corner, this wheel takes a wider sweep than the two driving wheels, which go first. In travelling on a straight road (backwards) the machine is turned to either side by turning the steering wheel to the opposite side. The boiler is a vertical one, with four tubes, one and a half inches internal diameter, hanging down by the side of the fire-box. The fire-grate is cast with four holes in it to receive the bottom ends of the tubes so as to hold them firmly. Height of boiler, two feet six inches; height of fire-box, fifteen inches; diameter of fire-box, eleven inches; diameter of boiler, fourteen inches. The fire-box and tubes are copper, pressure two hundred pounds; but twenty-five pounds of steam will be equal to a velocipede propelled by the feet. * * * * *