Subjects
- Photographers.1
- Photographs shelf.1
- Photography industry--United States.1
- Phrenology--United States--History--19th century.1
- Physiognomy--United States--History--19th century.1
- Postal service.1
- Prices--California--San Francisco.1
- Prices--New York (State)--New York.1
- Prisoners--Wisconsin--Oshkosh.1
- Prostitution--California--San Francisco.1
- Protestants--United States--History--19th century.1
- Reconstruction (U.S. history, 1865-1877)1
- Religious institutions--California--San Francisco Bay Area--History--19th century.1
- Religious institutions--New York (State)--New York--History--19th century.1
- Robots.1
- Science--Study and teaching.1
- Scientific apparatus and instruments--United States--History--19th century.1
- Secret societies--United States.1
- Shovels.1
- Slavery--United States.1