At enough time of Hall's discovery, aluminum was a really expensive steel. It bought for about $10 for every pound—so scarce and was shown in the 1855 Paris Exposition future the French crown jewels. Because of Hall's analysis, the price of aluminum dropped to below $.40 for every pound). Smelting https://felixeukyl.p2blogs.com/36192068/the-definitive-guide-to-sheds-and-garages