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:
January 1943. Calumet City, Illinois. Indiana Harbor Belt Railroad switchman demonstrating signal with a fusee, used at twilight and dawn, when visibility is poor. This signal means "go ahead." View full size. Caption and 4x5 Kodachrome transparency by Jack Delano for the Office of War Information.