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Various kinds of furnaces are noticed in the Bible, such as a smelting or calcining furnace, (Genesis 19:28; Exodus 9:8,10; 19:18) especially a lime-kiln, (Isaiah 33:12; Amos 2:1) a refining furnace, (Proverbs 17:3) Nebuchadnezzar's furnace, a large furnace built like a brick-kiln, (Daniel 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. (Daniel 3:22,23; Jeremiah 29:22)