Abstract: The incinerator comprises a dome-shaped furnace containing a fire brick retaining wall, which has an upper edge spaced just beneath the curved ceiling of the furnace, and which divides the furnace into a large primary combustion chamber, and a smaller secondary combustion chamber. A plurality of perforated air-supply tubes are mounted in the primary chamber above a pathological hearth, which is mounted adjacent the bottom of the primary chamber to extend horizontally between the retaining wall and one side of the furnace. Combustion by-products created in the primary chamber pass over the top of the retaining wall, and then downwardly through the secondary combustion chamber and through an opening in the bottom thereof to one side of a discharge duct, which extends beneath the hearth to communicate with a smoke stack that is mounted at the back of a furnace.