Keywords: Walloon hearth sketch.png acier naturel selon la méthode wallonne Ce foyer wallon a été utilisé en Suède à la fin du XIXème siècle finery hearth use to convert pig iron in charcoal-hearth iron or wrought iron This Wallon hearth was used in Sweden at the end of XIX century 1890 https //archive org/details/metallurgyofstee00howerich The metallurgy of steel p 290 Henry Marion Howe 1848-1922 other versions PD-old-70-1923 Uploaded with UploadWizard Drawings of finery forges Images from The metallurgy of steel by H E Howe |