Subjects
- Inventors.1
- Iron mining.1
- Japanese.1
- Laborers.1
- Lifeguards.1
- Lighthouses.1
- Lightships.1
- Lithography.1
- Loading docks.1
- Machine shops.1
- Machinery.1
- Manufacturing.1
- Masonry.1
- Metallurgical industry.1
- Metalwork.1
- Military art & science.1
- Military officers.1
- Military reconnaissance--American.1
- Mines.1
- Mining--United States.1