Subjects
- Agriculture1
- Burr Conspiracy, 1805-18071
- Diaries and journals.2
- Farms and farming.1
- Fish hatcheries1
- Frontier and pioneer life2
- Indians of North America1
- Lumber trade1
- Mills and mill-work1
- Mining. SEE ALSO Coal mining.1
- Patrons of Husbandry.1
- Petroleum industry and trade1
- Railroads - Allegheny Valley Railroad.1
- Railroads - Baltimore and Ohio Railroad.1
- Railroads - Chicago, Rock Island, and Pacific Railroad.1