KILLAS

is the name by which clay-slate is known among the Cornish miners. KILN; ( Four , Fr.; Ofen , Germ.) is the name given to various forms of furnaces and stoves, by which an attempered heat may be applied to bodies; thus there are brick-kilns, hop-kilns, lime-kilns, malt-kilns, pottery-kilns. Hop and malt kilns, being designed merely to expel the moisture of the vegetable matter, may be constructed in the same way. See Brick , Limestone , Malt , Pottery , for a description of their respective kilns. KINIC ACID; a peculiar acid extracted by Vauquelin from cinchona.