Principio Furnace

File:Historic_American_Buildings_Survey_E._H._Pickering,_Photographer_October_1936_-_Principio_Furnace,_Port_Road_(State_Route_7),_Perryville,_Cecil_County,_MD_HABS_MD,8-PRINF,1-1.tif|The old bloomery, depicted in 1936 File:Principio Furnace (21415394958).jpg|The old bloomery during the preservation works of 2015 File:Principio_Furnace,_wide_(21415201900).jpg|Another view of the bloomery, during the works of 2015 File:Principio Furnace, outbuilding (21416308829).jpg|An outbuilding on the site of the Principio Furnace File:Principio Furnace, outbuildings (20980440884).jpg|Two more outbuildings on the site of the Principio Furnace File:Historic American Buildings Survey E. H. Pickering, Photographer October 1936 OLD LITHOGRAPH - Principio Furnace, Port Road (State Route 7), Perryville, Cecil County, MD HABS MD,8-PRINF,1-3.tif|A lithograph scene of the activity at the furnace ==References==