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| Keywords: Improved vertical bessemer converter section.png Bessemer converter The improvement consists in the top chamber whixh collects sparks and fumes convertisseur Bessemer expérimental La chambre supérieure piège les étincelles et les fumées http //www history rochester edu/ehp-book/shb/start htm scanned by Eric Hutton 1996 1905 Henry Bessemer PD-old Images from Sir Henry Bessemer F R S An autobiography by H Bessemer Drawings of Bessemer converters | ||||
