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  2. Bronze disease - Wikipedia

    en.wikipedia.org/wiki/Bronze_disease

    Bronze disease is an irreversible and nearly inexorable corrosion process that occurs when chlorides come into contact with bronze or other copper-bearing alloys. [ 1 ] It can occur as both a dark green coating, or as a much lighter whitish fuzzy or furry green coating. [ 1 ] It is not a bacterial infection, but the result of a chemical ...

  3. Columbian half dollar - Wikipedia

    en.wikipedia.org/wiki/Columbian_half_dollar

    1892. The Columbian half dollar is a coin issued by the Bureau of the Mint in 1892 and 1893. The first traditional United States commemorative coin, it was issued both to raise funds for the 1893 World's Columbian Exposition and to mark the quadricentennial of the first voyage to the Americas of Christopher Columbus, whose portrait it bears.

  4. Coinage metals - Wikipedia

    en.wikipedia.org/wiki/Coinage_metals

    Gold, silver and bronze or copper were the principal coinage metals of the ancient world, the medieval period and into the late modern period when the diversity of coinage metals increased. Coins are often made from more than one metal, either using alloys, coatings (cladding / plating) or bimetallic configurations.

  5. Sacagawea dollar - Wikipedia

    en.wikipedia.org/wiki/Sacagawea_dollar

    Design date. 2009–present. The Sacagawea dollar (also known as the " golden dollar ") is a United States dollar coin introduced in 2000, but subsequently minted only for niche circulation from 2002 onward. The coin generally failed to meet consumer and business demands. It is still generally accepted in circulation.

  6. Follis - Wikipedia

    en.wikipedia.org/wiki/Follis

    A Byzantine follis of Constantine VII and Zoe. 914-919AD. 26 mm. The term "follis" is used for the large bronze coin denomination (40 nummi) introduced in 498, with the coinage reform of Anastasius, which included a series of bronze denominations with their values marked in Greek numerals. The fals (a corruption of follis) was a bronze coin ...

  7. Columbus Register of Historic Properties - Wikipedia

    en.wikipedia.org/wiki/Columbus_Register_of...

    The Columbus Register of Historic Propertiesis a register for historic buildings and other sites in Columbus, Ohio, United States. The register is maintained by the City of Columbus Historic Resources Commission and Historic Preservation Office, and was established in 1980.[1] Many of these landmarks are also listed on the National Register of ...

  8. Bar Kokhba revolt coinage - Wikipedia

    en.wikipedia.org/wiki/Bar_Kokhba_Revolt_coinage

    The first group of these coins reviewed by numismatists were 10 silver pieces and one bronze piece found in the mid-nineteenth century. [3] By 1881 the number of coins had grown to 43, [3] and many more have been found since. [4] These coins were first attributed to Bar Kokhba by Moritz Abraham Levy in 1862 and Frederic Madden in 1864. [3]

  9. Battelle Memorial Institute - Wikipedia

    en.wikipedia.org/wiki/Battelle_Memorial_Institute

    US$ 6.2 billion [1] Number of employees. 3,200. Website. www.battelle.org. Headquarters in Columbus. Battelle Memorial Institute (or simply Battelle) is a private nonprofit applied science and technology development company headquartered in Columbus, Ohio. The institute opened in 1929 but traces its origins to the 1923 will of Ohio ...

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