Pennsylvania--Economic conditions--19th century 4 Anthracite coal industry 1 Anthracite coal mines and mining 1 Charitable Organizations--Philadelphia 1 Commerce--19th Century 1 Commerce--Philadelphia--19th century 1 Economic conditions 1 more ... Economic history 1 History 1 Leather tanning--Pennsylvania--19th century 1 Medical History--19th Century 1 Philadelphia (Pa.)--Commerce--History--19th century 1 Public welfare--Pennsylvania 1 Public welfare--Pennsylvania--Philadelphia--History--19th century 1 Shipping--Pennsylvania--Philadelphia 1 Social life and customs--19th century 1 Tanners and Tanning--19th century 1 Trade Regulations--19th century 1 Trade and professional associations--Philadelphia (Pa.)--19th century 1 Trade and professional associations--Philadelphia (Pa.)--20th century 1 Trade--Pennsylvania--19th century 1 United States--Economic conditions--19th century 1 less ...