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:

Matoaca, Virginia. June 1911. "Lawrence Purdie (right end) has been spinning in the mule room of the cotton mill at Matoaca for two years. His brother, next to him, helps there. Others in the photo are not working yet. The father is not at work now as work is slack." View full size. Photo and caption by Lewis Wickes Hine.

A closeup of Santa Fe 5000, as identified by Lost World below in the original post of the uncropped photo taken in 1943 by Jack Delano. View full size.

Chicago, April 1943. Proviso freight classification yard of the Chicago & North Western R.R. View full size. 4x5 Kodachrome transparency by Jack Delano.

October 1935. "Poverty on the march." Wife and child of destitute Ozark family in Arkansas. 35mm nitrate negative by Ben Shahn. View full size.

October 1935. Son of destitute Ozark family on the road in Arkansas. 35mm nitrate negative by Ben Shahn, Farm Security Administration. View full size.

March 1943. Westbound Santa Fe freight on a siding at Ricardo, New Mexico, waiting for the eastbound train to pass. View full size. 4x5 Kodachrome transparency by Jack Delano. FSA/Office of War Information archive.

Papyrus-motif colonnade, Court of Amenhotep III at the Temple of Thebes (Luxor, Egypt). Circa 1858 albumen print by Francis Frith. View full size.