electrothermic metallurgy of zinc The electrothermic metallurgy of zinc This book, "The electrothermic metallurgy of zinc", by B. M. O'Harra, is a replication of a book originally published before 1923. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.