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:

1913. "Young woman posed with an Evinrude outboard motor." Able to outrun any lad with a Johnson. R.R. Johnstone photo studio, Milwaukee. View full size.

October 1939. "Mr. Dougherty and one of the children. Warm Springs district, Malheur County, Oregon." Photo by Dorothea Lange. View full size.

April 1923. Washington, D.C. Another unlabeled Harris & Ewing plate, showing someone we imagine to be the bureaucrat tasked with kindling fire-prevention slogans. Say, does it seem a little smokey in here? View full size.

May 1956, in the field house at University of Dayton, in the presence of The One. 35mm negative by Phillip Harrington for Look magazine. View full size.

October 1935. Marysville, California. "Agricultural worker in migrant camp figuring his year's earnings," i.e. a rubber check. Medium-format nitrate negative by Dorothea Lange for the Resettlement Administration. View full size.

September 1937. "Icehouse. Rosslyn, Virginia." Just across the Potomac from Washington, the home of beer, wine and 7-Up from 7 to 7, as well as one cool cat. Medium-format nitrate negative by John Vachon. View full size.

UPDATE: the photo now has a caption.
May 25, 1923. Miss Grace Gloria Ahr, chosen to be the modern emulator of Cleopatra in the "Congress of the Seas" during Shrine Week.
From the other end of the forgotten-Washington spectrum comes this unlabeled Harris & Ewing plate from around 1920. 4x5 glass negative. View full size.