Subjects
- Painters--19th century.1
- Paper industry.1
- Patent suits--United States.1
- People associated with manual labor.1
- Petroluem industry.1
- Photographs shelf.1
- Piers & wharves.1
- Portraits.1
- Pottery.1
- Power plants.1
- Prices--California--San Francisco.1
- Prices--New York (State)--New York.1
- Prints shelf.1
- Prisoners of war.1
- Prostitution--California--San Francisco.1
- Pumping stations.1
- Pumps.1
- Quarrying.1
- Railroad accidents.1
- Railroad bridges.1