History 58 Manufactures 53 Glass manufacture 42 Gas manufacture and works 26 Cotton manufacture 24 Sugar 19 Manufacture and refining 17 more ... Manufacturers 16 Manufacturing industries 16 Glassware 14 Commerce 11 Cotton growing 11 Industries 11 Woolen and worsted manufacture 10 Cotton growing and manufacture 9 Streets 9 Equipment and supplies 8 Tariff 8 Textile industry 8 Agriculture 7 Protectionism 7 Description and travel 6 Manufacture 6 Manufacturing 6 Societies, etc 6 Strikes 6 Catalogs 5 Economic conditions 5 Labor and laboring classes 5 Manufacturer's catalogs 5 Manufacturing--Philadelphia--20th century 5 Ordnance 5 African Americans 4 Chemical industry 4 Electrical apparatus industry 4 Employment 4 Iron Manufacturing--19th century 4 Iron industry and trade 4 Maple sugar 4 Porcelain 4 less ...