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Bellows

BELLOWS. An ancient device for fanning the flames of the fires of the smelting furnace. [[The Egyptian]] type of bellows was operated by the feet, as one alternately trod on two inflated skins. This created a forced draft by means of reed tubes tipped with iron; the air thus jettisoned into the glowing fire caused the flames to burn more brilliantly and hotly. As each skin was exhausted of its supply of air, the workman would raise it by a cord attached for that purpose and inflate the skin again. This process was then repeated as many times as was necessary. See Jer.6.29.