February 1875 Issue [Article] The first century of the republic. (Fourth paper.) Mechanical progress.–III Download PDF Adjust Share by Edward Henry Knight, This article is only available as a PDF to subscribers. Download PDF Tags 19th century Elevators Fire engines industry Mechanical engineering Sewing-machine industry Telegraph United States Weapons More from Edward Henry Knight The mariners’ “cautionary signal” The first century of the republic. (Fifth paper.) Mechanical progress. (Concluded.) Printing The first century of the republic. (Third paper.) Mechanical progress.–II Adjust Share