Basic illustration of measuring for Specific Gravity. Image courtesy of University of Walkato in New Zealand.
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Recent News
- Legend Rare Coin Auctions to Present Final Section of Northern Lights Collection Along With Fresh 1994 Collection in Las Vegas on July 13. June 23, 2017
- U.S. Mint Video: San Francisco Mint Employees June 23, 2017
- United States Mint Opens Sales for Uncirculated Version of American Eagle Silver Coin on June 29 June 22, 2017
- VIDEO: International Paper Money Show Attracts World Bank Note Collectors to Kansas City June 22, 2017
- Miles Standish getting head shaved at ANA Denver convention June 20, 2017
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