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  2. Eternal flame - Wikipedia

    en.wikipedia.org/wiki/Eternal_flame

    Nizhny Novgorod Kremlin eternal flame memorializing losses during World War II .. An eternal flame is a flame, lamp or torch that burns for an indefinite time. Most eternal flames are ignited and tended intentionally, but some are natural phenomena caused by natural gas leaks, peat fires and coal seam fires, all of which can be initially ignited by lightning, piezoelectricity or human activity ...

  3. Fitchburg Furnace - Wikipedia

    en.wikipedia.org/wiki/Fitchburg_Furnace

    The massive structure stands 115 feet long, 40 feet wide, and 65 feet high. A number of innovative features first used at this furnace were later taken up by modern furnaces. [2] Designed by Fred Fitch and built by Sam Worthley, a stonemason from Scotland, the furnace was completed in 1869, and operated by Red River Iron Works. [3]

  4. Open-hearth furnace - Wikipedia

    en.wikipedia.org/wiki/Open-hearth_furnace

    In Hunedoara steel works, Romania the last 420-tonne capacity open-hearth furnace was shut down on 12 June 1999 and demolished and scrapped between 2001 and 2003, but the eight smokestacks of the furnaces remained until February 2011. The last open-hearth shop in China was shut down in 2001.

  5. Tatara (furnace) - Wikipedia

    en.wikipedia.org/wiki/Tatara_(furnace)

    By 1920, Tatara Furnaces were no longer economically viable and they closed once the Western blast furnace was introduced to Japan. In 1977, the Society for Preservation of Japanese Art Swords and historical firearms ( Nihon Bijutsu Token Hozon Kyokai ) with the approval of the Japanese government's department of the environment built a tatara ...

  6. Carrie Furnace - Wikipedia

    en.wikipedia.org/wiki/Carrie_Furnace

    Carrie Furnace is a former blast furnace located along the Monongahela River in the Pittsburgh area industrial town of Swissvale, Pennsylvania, and it had formed a part of the Homestead Steel Works. The Carrie Furnaces were built in 1884 and they operated until 1982. During its peak, the site produced 1,000 to 1,250 tons of iron per day. [3]

  7. Future of Earth - Wikipedia

    en.wikipedia.org/wiki/Future_of_Earth

    These combined effects are expected to increase the length of the day by more than 1.5 hours over the next 250 million years, and to increase the obliquity by about a half degree. The distance to the Moon will increase by about 1.5 Earth radii during the same period. [48]