• | Agriculture |
(3)
|
• | Slavery |
(3)
|
• | Surveying | [X] |
• | Clothing and dress |
(2)
|
• | Clothing and dress -- Purchasing |
(2)
|
• | Domestic animals |
(2)
|
• | Enslaved persons |
(2)
|
• | Enslaved persons -- Diseases |
(2)
|
• | Farm management |
(2)
|
• | Fugitive slaves -- Virginia |
(2)
|
• | Indentured servants |
(2)
|
• | Lewis, Lawrence, 1767-1839 -- Estate |
(2)
|
• | Medicine -- History -- 18th century |
(2)
|
• | Native Americans |
(2)
|
• | Real property |
(2)
|
• | United States. Continental Army -- Recruiting, enlistment, etc. |
(2)
|
• | Washington's Birthday |
(2)
|
• | Washington, George, 1732-1799 -- Inaugurations |
(2)
|
• | Washington, Lawrence, 1718-1752 -- Estate |
(2)
|
• | African American soldiers |
(1)
|
• | American loyalists |
(1)
|
• | Art -- Conservation and restoration |
(1)
|
• | Artificial intelligence |
(1)
|
• | Brass rubbing |
(1)
|
• | Brasses |
(1)
|
• | Brasses, Victorian |
(1)
|
• | Campaign Polling |
(1)
|
• | Canals |
(1)
|
• | Carpentry |
(1)
|
• | Coal |
(1)
|
• | Coal slurry pipelines |
(1)
|
• | Coal-fired power plants |
(1)
|
• | Computers |
(1)
|
• | Conservation of natural resources |
(1)
|
• | Constitutional conventions -- United States |
(1)
|
• | Cooking -- Equipment and supplies |
(1)
|
• | Cryptography |
(1)
|
• | Dams |
(1)
|
• | Debts, Public |
(1)
|
• | Dentistry |
(1)
|
• | Distilleries |
(1)
|
• | ENIAC (Computer) |
(1)
|
• | Economics |
(1)
|
• | Elections |
(1)
|
• | Engravings (prints) |
(1)
|
• | Enslaved persons -- Dwellings |
(1)
|
• | Enslaved persons -- Emancipation |
(1)
|
• | Erosion |
(1)
|
• | Espionage |
(1)
|
• | Eugenics |
(1)
|
• | Fertilizer industry -- Waste disposal |
(1)
|
• | Fisheries |
(1)
|
• | Floods |
(1)
|
• | Forbes Expedition against Fort Duquesne, Pa., 1758 |
(1)
|
• | Freedmen |
(1)
|
• | French Americans |
(1)
|
• | Furniture |
(1)
|
• | Gardening |
(1)
|
• | General Problem Solver |
(1)
|
• | Geography |
(1)
|
• | Glacial epoch |
(1)
|
• | Gothic revival (Art) |
(1)
|
• | Guano industry |
(1)
|
• | Huguenots |
(1)
|
• | Huguenots -- Genealogy |
(1)
|
• | Hydroelectric generators |
(1)
|
• | Hydroelectric power plants |
(1)
|
• | Imperial Way Faction |
(1)
|
• | Iron founding |
(1)
|
• | Iron mines and mining |
(1)
|
• | Iron ores |
(1)
|
• | Jet stream |
(1)
|
• | Kanrin Maru (Ship) |
(1)
|
• | Landing craft |
(1)
|
• | Leggett, Aaron, 1792-1860 -- Estate |
(1)
|
• | Makonde (African people) |
(1)
|
• | Malthusianism |
(1)
|
• | Mapiko (Dance drama) |
(1)
|
• | Medicine -- History -- 19th century |
(1)
|
• | Military engineering |
(1)
|
• | Military ethics |
(1)
|
• | Monongahela, Battle of the, Pa., 1755 |
(1)
|
• | Mural painting and decoration |
(1)
|
• | Mutiny |
(1)
|
• | Nutrient pollution of water |
(1)
|
• | Painting, Netherlandish |
(1)
|
• | Painting, Renaissance |
(1)
|
• | Performance art |
(1)
|
• | Pesticides |
(1)
|
• | Philosophy |
(1)
|
• | Psychometrics |
(1)
|
• | Qing Dynasty (China) |
(1)
|
• | Railroads |
(1)
|
• | Romanies |
(1)
|
• | Scots |
(1)
|
• | Scottish Americans |
(1)
|
• | Sculpture, Gothic |
(1)
|
• | Sculpture, Makonde |
(1)
|
• | Seneca Indians |
(1)
|
• | Silt |
(1)
|
• | Smallpox |
(1)
|
• | Sociology |
(1)
|
• | Spinning |
(1)
|
• | Statistics |
(1)
|
• | Taiping Rebellion |
(1)
|
• | Tin mines and mining |
(1)
|
• | Transatlantic slave trade |
(1)
|
• | Turing test |
(1)
|
• | USS Fenimore Cooper |
(1)
|
• | United States--Politics and government |
(1)
|
• | Univac computer |
(1)
|
• | University towns -- Economic aspects |
(1)
|
• | Venona project |
(1)
|
• | Vice-presidents -- United States -- Election |
(1)
|
• | Virginia -- James River and Kanawha Canal |
(1)
|
• | War crimes |
(1)
|
• | Washington, George Augustine, approximately 1759-1793 -- Estate |
(1)
|
• | Washington, George, 1732-1799 -- Death and burial |
(1)
|
• | Washington, George, 1732-1799 -- Estate |
(1)
|
• | Washington, George, 1732-1799 -- Homes and haunts |
(1)
|
• | Washington, George, 1732-1799 -- Monuments |
(1)
|
• | Washington, George, 1732-1799 -- Old Tomb |
(1)
|
• | Washington, George, 1732-1799 -- Relics |
(1)
|
• | Washington, George, 1732-1799 -- Tomb |
(1)
|
• | Washington, George, 1732-1799 -- Trials, litigation, etc. |
(1)
|
• | Washington, John Augustine, 1736-1787 -- Estate |
(1)
|
• | Washington, Mary Ball, 1708-1789 -- Estate |
(1)
|
• | Water -- Pollution |
(1)
|
• | Water mills |
(1)
|
• | Whiskey Rebellion, Pa., 1794 |
(1)
|
• | Wine and wine making |
(1)
|
• | Wine industry |
(1)
|
• | Women -- Education -- History |
(1)
|
• | World War (1939-1945) |
(1)
|
• | Wrought-iron |
(1)
|