Land surveys 13 Land Surveys--18th century 10 Land surveys--Pennsylvania--18th century 6 Land surveys--Pennsylvania--Philadelphia--18th century 4 Land Settlements--Pennsylvania 3 Pennsylvania--Politics and government--18th century 3 Floods--Pennsylvania--Johnstown (Cambria County) 2 more ... Forest nurseries 2 Genealogy 2 Ironwork 2 Land Surveys and Field Books 2 Land Warrants-Pennsylvania--18th century 2 Land surveys--Pennsylvania--17th century 2 Land surveys--Pennsylvania--19th century 2 Land surveys--Pennsylvania--Philadelphia--19th century 2 Pennsylvania--Surveys 2 Stenographers 2 Surveying 2 Agriculture--18th century 1 Armstrong, John 1 Astrology--German--18th Century 1 Astronomy--18th century 1 Bank of the United States 1 Beekeeping--German--18th Century 1 Canals--Pennsylvania 1 China--Commerce 1 Coal Industry--Pennsylvania--19th century 1 Commerce--18th century 1 Deeds--Germantown (Philadelphia, Pa.)--18th century 1 Deeds--Pennsylvania--18th Century 1 Estate administration--18th-19th Centuries 1 Estate administration--19th century 1 Fort Duquesne 1 Fortifications--Plans--18th and 19th centuries 1 Geography--19th century 1 Germantown (Philadelphia, Pa.)--History 1 Indian--White Relations--18th century 1 Internal Improvements--18th century 1 Islands--Pennsylvania 1 Land Settlement--Luzerne Co. (Pa.)--18th century 1 less ...