Wikimedi'Òc

Bridesburg Machine Works.jpg - Coemgenus

Winter below Red Bridge, by Woodward, C. W. (Charles Warren).png - DcoetzeeBot

Winter below Red Bridge, by Woodward, C. W. (Charles Warren).jpg - DcoetzeeBot

US-PA(1891) p712 GERMANTOWN, OLDEST MILL IN PENNSYLVANIA.jpg - Metilsteiner

SWITCH HOUSE, ELEVATION, LOOKING EAST - Philadelphia Electric Company, Richmond Power Station, Southeast end of Lewis Street along Delaware River, Philadelphia, Philadelphia County, PA HAER PA-574-18.tif - Fæ

SWITCH HOUSE, LOOKING EAST - Philadelphia Electric Company, Richmond Power Station, Southeast end of Lewis Street along Delaware River, Philadelphia, Philadelphia County, PA HAER PA-574-17.tif - Fæ

LOSSING(1876) p051 THOMAS DOLAN & CO., KEY-STONE MILLS, PHILADELPHIA (1).jpg - Metilsteiner

LOSSING(1876) p051 THOMAS DOLAN & CO., KEY-STONE MILLS, PHILADELPHIA (2).jpg - Metilsteiner

Turbine hall in a power plant in Philadelphia.webm - The Nature Box

Bridesburg Machine Works. Alfred Jenks and Son, manufacturers of cotton and wool carding spinning and weaving machinery, shafting and millgearing, Bridesburg post office Philadelphia, (1856) (4680054490).jpg - Fæ

General View of F.A. Poth Brewing Company, Philadelphia, (ca. 1891) (4680054196).jpg - Fæ

Robert Wood's railing, architectural and ornamental iron works, Ridge Road below Spring Garden St., Philadelphia, (ca. 1851) (4679491606).jpg - Fæ

Keystone Marble Works. S. F. Jacoby and Co., Market St. betw. 20th and 21st Philadelphia, (1856) (4624098871).jpg - Fæ

Philadelphia Old Historic Paper Mill Wissahickon ca1908.jpg - Mary Mark Ockerbloom

Philadelphia and Its Manufactures - A Hand-Book of the Great Manufactories and Representative Mercantile Houses of Philadelphia, in 1867 (IA PhiladelphiaAndItsManufactures1867).pdf - Fæ

RICHMOND STATION NORTHEAST PHILADELPHIA, PA.jpg - KLOTZPLATE