Subjects
- Photography industry--United States.1
- Picnics--United States--1890-1910.1
- Piers & wharves.1
- Postal service.1
- Pottery.1
- Power plants.1
- Prints shelf.1
- Pumping stations.1
- Pumps.1
- Quarrying.1
- Railroad accidents.1
- Railroad bridges.1
- Railroad companies.1
- Railroad locomotives.1
- Railroad stations.1
- Railroads--Rolling stock.1
- Railroads.1
- Recreation--Michigan--1890-1910.1
- Reservoirs.1
- Roads.1