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Subject
- Canals9
- Corporation reports9
- Federal receipts and expenditures9
- Financial statements9
- Military pensions9
- National parks and reserves9
- Nicaragua Maritime Canal Company9
- Patents9
- Railroads9
- St. Elizabeth's Hospital (District of Columbia)9
- Census8
- Columbia Institution for the Deaf and Dumb (1865-1911)8
- Freedmen's Hospital (Washington, D.C.)8
- Howard University8
- Interoceanic canals8
- Black universities and colleges7
- Canal companies7
- Deaf education7
- Hospitals7
- Psychiatric hospitals7