Wikimedi'Òc

Nittanyfurnace.PNG - Choess

Nittanyfurnace crop.PNG - Ruhrfisch

Buena Vista Furnace.jpg - FlickreviewR

Cambria Iron Works, by Purviance, W. T. (William T.).jpg - DcoetzeeBot

Laura Furnace, on the Guniatha River, Harrisburg, Pa, from Robert N. Dennis collection of stereoscopic views.jpg - DcoetzeeBot

Plant of the blast furnace, Pittsburgh, Pa., U.S.A, from Robert N. Dennis collection of stereoscopic views.png - DcoetzeeBot

Plant of the blast furnace, Pittsburgh, Pa., U.S.A, from Robert N. Dennis collection of stereoscopic views.jpg - DcoetzeeBot

Plant of the blast furnace, Pittsburgh, Pa., U.S.A, from Robert N. Dennis collection of stereoscopic views 2.png - DcoetzeeBot

Plant of the blast furnace, Pittsburgh, Pa., U.S.A, from Robert N. Dennis collection of stereoscopic views 2.jpg - DcoetzeeBot

Shade Furnace.jpg - Nyttend

Laurel Hill Furnace.jpg - Nyttend

Eliza Furnace.jpg - Nyttend

Huntingdon Furnace.jpg - Nyttend

Allegheny Furnace.jpg - Nyttend

Hieland Furnace, Highland Township, Pa..JPG - Pattycaledonia

CornwallFurnacePA.jpg - BotMultichillT

Pittsburgh Sketches -- The Bottom of a Blast Furnace.jpg - MGA73bot2

Pittsburgh Sketches -- The Top of a Blast Furnace.jpg - MGA73bot2

Lock Ridge Furnace Complex.JPG - PattiParker

Hopewell Furnace National Historic Site - Pennsylvania (5655572602).jpg - File Upload Bot (Magnus Manske)

Hopewell Furnace National Historic Site - Pennsylvania (5655001279).jpg - File Upload Bot (Magnus Manske)

Buchanan Furnace 2006.JPG - Hankhuf

Wharton Furnace.jpg - Photography by Terry Miller

Wharton Furnace Fayette County.jpg - Generic1139

DETAIL OF WORK ARCH (OR POSSIBLY THE TUYERE ARCH) OF FURNACE LOOKING EAST - Shade Furnace, Reitz, Somerset County, PA HAER PA,56-ROCK.V,1-2.tif - Fæ

Historic American Buildings Survey, Frederick Tilberg, Photographer August, 1950 ELEVATION. - Stevens Furnace (Ruins), (Hamiltonban Township), Iron Springs, Adams County, PA HABS PA,1-IRONSP.V,2-1.tif - Fæ

Photocopied January 1973 from the Keystone Bridge Company Album, 1874. THE KEYSTONE BRIDGE COMPANY- LUCY FURNACE. - Baltimore and Ohio Railroad, Parkersburg Bridge, Ohio River, HAER WVA,54-PARK,2-1.tif - Fæ

Rockland Furnace.JPG - Thefulgurator

Swatara Furnance.jpg - JoeRed

Ross Furnace.jpg - Generic1139

The Pennsylvania railroad - its origin, construction, condition, and connections; embracing historical, descriptive, and statistical notices of cities, towns, villages, stations, industries, and (14761025855).jpg - Fæ

Carnegie Blast Furnaces, Homestead, Pa (NYPL b12647398-69739).tiff - Fæ

National Tube Works Furnaces, Pittsburgh, Pa (NYPL b12647398-69991).tiff - Fæ

Monroe Furnace ruins.jpg - Smallbones

George Taylor signed autograph manuscript letter.jpg - Frobinson95

Lackawanna Iron Furnace (Scranton).jpg - Bestbudbrian

Blast furnace A & B (4562636033).jpg - TheImaCow

NPS sign Hopewell Furnace Cold-blast Charcoal Furnace.jpg - Pi3.124

NPS sign Hopewell Furnace Cast House.jpg - Pi3.124

Isabella Furnace 1880.jpg - Brighterorange

Lucy Furnace 1900.jpg - Brighterorange

Carlisle Iron Works Furnace, Boiling Springs, PA.jpg - Zeete