[Unidentified machinery.]
[Man using unidentified machinery.]
[Man with unidentified machinery.]
[Machinery.]
[Unidentifued machinery.]
[Industrial machinery.]
[Interior with machinery.]
[Factory building, machinery on roof.]
Machinery in shoe factory
United Shoe Machinery Company. Slicing machine
[Machinery in a Brooklyn Rapid Transit machine shop.]
[Workers in a Brooklyn Rapid Transit machinery shop.]
[Diagram of an unidentified cylinder head.]