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:
Washington, D.C., circa 1924. "Brent Daniel, formerly of the Radio Laboratory of the Bureau of Standards at Washington, with the first portable Super-Heterodyne, his own design. The seven vacuum tubes, batteries, loop antenna, loudspeaker and other necessary units are completely self-contained in the carrying case. He has been able to hear Pacific Coast stations from this outfit." View full size.
Washington, D.C., circa 1918. "Bankers Automatic Receiving Teller Co." These machines (designed to look like little bank buildings) were used, among other places, in the D.C. schools into the 1930s to encourage thrifty habits. National Photo Company Collection glass negative. View full size.
July 1942. Melrose Park, Illinois. "Production of aircraft engines. Buick plant. Foreman F.I. Bowman shows Marietta Morgan how to operate this bomb-test machine used to test reconditioned spark plugs. A young Negro girl, Marietta had been a clerk in a meat market. Her lack of industrial experience, however, has been no handicap for her present war job in a large Midwest airplane plant. She's rapidly becoming a skilled and efficient machine operator." Medium format safety negative by Ann Rosener for the Office of War Information. View full size.