Subjects
- Authors -- Letters and papers1
- Diaries and journals.1
- Farms and farming.1
- Frontier and pioneer life1
- Mills and mill-work1
- Mining. SEE ALSO Coal mining.1
- Patrons of Husbandry.1
- Petroleum industry and trade1
- Railroads - Allegheny Valley Railroad.1
- Railroads - Chicago, Rock Island, and Pacific Railroad.1
- Rivers and river valleys.[remove]2
- Steamboats1
- Surveyors and surveying.1
- Women's history -- 1850-18991
- Women's history -- 1900-19291