This locomotive had two vertical working steam cylinders, which with the boiler, condenser, and other details were suspended to a wood frame at the rear of the carriage. The engineer was seated behind and did his own firing. The boiler was a series of horizontal water tubes, one and one-half inches in diameter and two feet long; at each end the flanges were bolted to the vertical tubes forming the sides of the furnace. Attached to the wood frame in front of the driving wheels, was a small water tank, and a force pump supplied the boiler with water. The steam, passing through the cylinder, went into an air condenser. The power of the engines was communicated from the piston rods to the driving wheels of the carriage by sweep rods, the lower ends of which were provided with driving pinions and detents, which operated upon toothed gear fixed to the hind carriage axle. The object of this mechanism was to keep the driving pinions always in gear with the toothed wheels, however the engine and other machinery might vibrate or the wheels be jolted upon uneven ground. The boiler, engine, and other working parts were suspended to the wood frame by chain slings, having strong spiral springs so as to reduce the vibration from rough roads. EDMUND CARTWRIGHT Born at Marnham, Nottinghamshire, England, April 24, 1743. Died at Hastings, October 30, 1823. Cartwright was educated at Oxford and secured a living in the English church. He devoted himself to the ministry and to literature until 1784, when he became interested in machinery and in the following year invented the power loom. He took out other patents and also gave some attention to devising a mechanical carriage propelled by man power. In 1822, he made a vehicle that was moved by a pair of treadles and cranks worked by the driver. Even the steam engine engaged his attention. Some improvements which he proposed in it are recorded in works on mechanics. While residing at Eltham, in Lincolnshire, he used frequently to tell his son that, if he lived to be a man, he would see both ships and land-carriages impelled by steam. At that early period he constructed a model of a steam engine attached to a barge, which he explained, about the year 1793, to Robert Fulton. It appears that even in his old age, only a year before his death, he was actively engaged in endeavoring to contrive a plan of propelling land-carriages by steam. T. BURTSALL