Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
Vintage photos of:
November 1941. "Slag runoff from one of the open-hearth furnaces at Republic Steel in Youngstown, Ohio. Slag is drawn off the furnace just before the molten steel is poured into ladles for ingotting." View full size. 4x5 Kodachrome transparency by Alfred Palmer for the Office of War Information.