Furnace. Various kinds of furnaces are noticed in the Bible, such as a smelting or calcining furnace, Gen. 19:28; Ex. 9:8, 10; 19:18, especially a lime-kiln, Isa. 33:12; Amos 2:1; a refining furnace, Prov. 17:3; Nebuchadnezzar’s furnace, a large furnace built like a brick-kiln, Dan. 3:22, 23, with two openings, one at the top for putting in the materials, and another below for removing them; the potter’s furnace, Ecclus. 27:5; the blacksmith’s furnace. Ecclus. 38:28. The Persians were in the habit of using the furnace as a means of inflicting punishment. Dan. 3:22, 23; Jer. 29:22.