Model, scale 1:8, Bodmer's travelling furnace-grate for steam boilers, 1843.
By this arrangement, patented by Mr. J. G. Bodmer in 1834-43, the coal fuel, while being burnt, is slowly conveyed from the front to the back of the furnace. This ensured that the hot gases from the burning coal passed over the glowing fuel, and was burnt before entering the boiler flues and chimney. This prevented smoke being produced, and helped reduce air pollution. One of these grates was at work in 1843, at Old Ford, near Bow; another was used on the Croydon Railway. The work was satisfactory, and smoke was prevented.