Subjects
- Italian Americans--History--19th century.1
- Italian Americans--Social conditions--19th century.1
- Laborers.1
- Lifeguards.1
- Lighthouses.1
- Lightships.1
- Loading docks.1
- Machine shops.1
- Machinery.1
- Mail.1
- Manufacturing.1
- Markets--California--San Francisco.1
- Markets--New York--New York.1
- Masonry.1
- Materialization.1
- Mediums--United States.1
- Metallurgical industry.1
- Metalwork.1
- Mines.1
- Mining--United States.1