Sometimes a small square hearth is cut in the sitting-room or some other convenient room; and in cold season a wooden frame supported by four pillars is put over the hearth and covered with a large quilt. Live charcoal is put into the hearth and the family sit around it with their knees under the quilt or lie down with their feet stretched out to the hearth. At other seasons the wooden frame is removed and a small mat of the same size as the hearth is put over it. As the hearth cannot be moved about, most people prefer a portable foot-warmer, which is usually a square wooden box with openings at the top and sides; one of the sides slides open and through it an earthen pan of live charcoal is placed inside. A quilt is laid over it as in the case of the hearth. Another, made specially for putting in bed, is of earthenware with a rounded top, which takes some time to heat. As the ordinary cut charcoal is consumed too quickly, balls of charcoal dust are used in these foot-warmers.