Man bending forward, working in blast furnace, rear view

Industry & Technology -line art Iron and steel making Apparatus for collecting waste gases from blast furnace that are then recycled to heat the air fed back into the furnace.

Industry & Technology -line art (w4) Iron and steel making An early 19th century blast furnace - a furnace used to smelt iron ore in very high temperatures by using very hot compressed air.

Industry & Technology -line art (cc4) Foundry Iron making The wall of an early 19th century blast furnace - a furnace used to smelt iron ore in very high temperatures by using very hot compressed air.

Industry & Technology -line art (w4) Iron and steel making An early 19th century blast furnace - a furnace used to smelt iron ore in very high temperatures by using very hot compressed air.

Industry & Technology -line art (cc4) Iron and steel making An early 19th century blast furnace (c. 1831) - a furnace used to smelt iron ore in very high temperatures by using very hot compressed air.

Industry & Technology -line art (w4) Iron and steel making An early 19th century blast furnace - a furnace used to smelt iron ore in very high temperatures by using very hot compressed air.

Industry & Technology -line art (cc4) Iron and steel making An early 19th century blast furnace - a furnace used to smelt iron ore in very high temperatures by using very hot compressed air.

Fashion & Costume - (Color) Carolingian France 750-800 A. D. The Carolingian dynasty (so called because they named many of the Kings Charles) ruled a major part of France and Northern Italy in the early Middle Ages. In this period blast furnaces for mak

Fashion & Costume - (Color) Carolingian France 750-800 A. D. The Carolingian dynasty (so called because they named many of the kings Charles) ruled a major part of France and Northern Italy in the early Middle Ages. In this period blast furnaces for mak

Blast furnace