Subjects
- Ice.1
- Inclined railroads.1
- Indians of North America -- Michigan.1
- Industrial facilities.1
- Industry--United States.1
- Industry.1
- Inventors.1
- Iron mining.1
- Kitchens.1
- Laborers.1
- Lifeguards.1
- Lighthouses -- Michigan.1
- Lighthouses.1
- Lightships.1
- Loading docks.1
- Logging -- Michigan -- Upper Peninsula.1
- Lumbering -- Michigan -- Upper Peninsula.1
- Machine shops.1
- Machinery.1
- Manufacturing.1