Mechanical and Civil Engineering, Division of [former name], NMAH, SI
0.6 cu. ft.; 0.017 cu. meters
Mixed archival materials
A controversy over the merits of cast iron vs. steel as the best material for the manufacture of ordnance led the United States Congress to appropriate money in 1873 for an improved materials testing machine. The machine, built by Albert H. Emery in 1879, was installed at Watertown Arsenal and was used for over 80 years to research a broad range of materials questions.
Photographs of plans, notes, patent specifications, clippings, and articles regarding the Emery Testing Machine and materials testing; and correspondence of the United States Army Chief of Ordnance with ordnance officers regarding the machine, 1875-1866, and published reports of tests carried out with the machine, 1888.