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<p>[QUOTE="kevin McGonigal, post: 5061551, member: 72790"]I think you will find that most metallurgist believe that the fineness of the silver issues of Caracalla was closer to a bit under 50% fine silver. In addition to the Harl book mentioned in this article above, Kevin Butcher has written an incredibly detailed and researched book on this very topic. Butcher has relied on the latest technique for calculating the content of these coins, not by testing the fineness of the surface metal, which for several reasons tends to be somewhat higher than for the metal below the surface, but by relying on a procedure that drills into the heart of the coin and removes the metal from the coin's interior. These tests have revealed that most studies calculating the percentage of silver in these highly debased coins are too high and need to be lowered to reflect the entirety of the alloy.[/QUOTE]</p><p><br /></p>
[QUOTE="kevin McGonigal, post: 5061551, member: 72790"]I think you will find that most metallurgist believe that the fineness of the silver issues of Caracalla was closer to a bit under 50% fine silver. In addition to the Harl book mentioned in this article above, Kevin Butcher has written an incredibly detailed and researched book on this very topic. Butcher has relied on the latest technique for calculating the content of these coins, not by testing the fineness of the surface metal, which for several reasons tends to be somewhat higher than for the metal below the surface, but by relying on a procedure that drills into the heart of the coin and removes the metal from the coin's interior. These tests have revealed that most studies calculating the percentage of silver in these highly debased coins are too high and need to be lowered to reflect the entirety of the alloy.[/QUOTE]
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