An engineer, of Edinburgh, Scotland, T. Burtsall, in conjunction with J. Hill, of London, got out, in 1824, a patent for flash or instantaneous generation boilers. His aim was to make the metal of the boiler store heat instead of a mass of water, and he accomplished this by heating the boiler to anywhere from two hundred and fifty degrees to six hundred degrees Fahrenheit, keeping the water in a separate vessel and pumping it into the boiler as steam was required. A coach that he built to run with this boiler weighed eight tons, and it was a failure, simply because the boiler could not make steam fast enough. T. W. PARKER A working model of a light steam carriage was made by T. W. Parker, of Illinois, in 1825. Three wheels supported the carriage, the two hind wheels being eight feet in diameter. The double-cylinder engine was used. GEORGE POCOCK One of the most curious of the wind vehicle productions that held the fancy of scientists to a slight extent in the early part of the nineteenth century was the charvolant or kite carriage that was devised by George Pocock in 1826, and built by Pocock and his partner, Colonel Viney. This was a very light one-seated carriage, drawn by a string of kites harnessed tandem. With a good wind these kites developed great power and it is said that the carriage whirled along, even on heavy roads, at the rate of a mile in three or even two and one-half minutes. Once Viney and Pocock made the trip from Bristol to London, and they often ran their carriage around Hyde Park and the suburbs of London. As the wind could not always be depended upon the charvolant was provided with a rear platform, upon which a pony was carried for emergencies. SAMUEL BROWN In 1826, Samuel Brown applied his gas-vacuum engine to the propulsion of a carriage, which was effectively worked along the public roads in England. It even ascended the very steep acclivity of Shooter's Hill, in Kent, to the astonishment of numerous spectators. The expense of working this machine was, however, said far to exceed that of steam, and this formed a barrier to its introduction. Experiments with this engine for the propulsion of vessels on canals or rivers were also made by the Canal Gas Engine Company. Brown patented a locomotive for common roads in 1823. JAMES NEVILLE