Iron-works 19 History 14 Iron industry and trade 14 Equipment and supplies 5 Iron and steel workers 3 Iron foundries 3 Iron mines and mining 3 more ... Ironwork 3 Steel-works 3 Usines sidérurgiques 3 Automobile industry and trade 2 Church buildings 2 Constructions scolaires 2 Forge shops 2 Forging 2 Forging industry 2 Furnaces 2 Historic sites 2 Industries 2 Iron works 2 Periodicals 2 Pipe fittings 2 Pipe fittings industry 2 Railroads 2 School buildings 2 Streets 2 5th St., S below Tasker Ave 1 Adams St. at Frankford Ave 1 Architectural ironwork 1 Blast furnaces 1 Buildings, structures, etc 1 Businessmen 1 Cast-iron fronts (Architecture) 1 Coal mines and mining 1 Comly St. and Milnor St 1 Commerce 1 Commercial catalogs 1 Directories 1 Dissertations 1 Dulany family 1 less ...