The SciencesFeodossieff's New Method of Tempering and Hardening Steel for Cannon and ProjectilesBy Watson Smith on May 31, 1890AdvertisementABOUT THE AUTHOR(S)Recent Articles by Watson SmithOn Wool and Fur, modes of Cleansing them for the Textile Industry, and on a New Process Recently Patented by Messrs. Singer & JudellOn Wool and Fur, their Origin, Structure, Chemical and Physical Properties, and CompositionChemical and Allied Industries