[var. of QUARREL sb.1] A large brick or tile; esp. a fire-brick, curved like part of a cylinder, used to form supports for melting-pots, retort-covers, etc.
1875. Ure’s Dict. Arts, III. 67. (s.v. Lead) The erection of nine six-ton pots requires … 160 feet of quarles.
1883. Daily News, 19 Sept., 3/2. Making passages below the oven floor, and laying upon these passages perforated quarles or recessed bricks.
1894. Northumbld. Gloss., s.v., Under the term ‘brick’ are included sizes up to twelve inches long, by six inches wide. Above this area it is called a quarl or tile.
