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:

October 1939. "Mr. and Mrs. Wardlaw at entrance to their dugout basement home. Dead Ox Flat, Malheur County, Oregon." Medium-format nitrate negative by Dorothea Lange for the Resettlement Administration. View full size.

March 1936. Edwards, Mississippi. "Main street storefronts." Large-format nitrate negative by Walker Evans for the Farm Security Administration. View full size.

December 1935. "New Orleans, downtown street." North Front at Canal. Nitrate negative by Walker Evans for the Farm Security Administration. View full size.

Washington, D.C., circa 1919. "G.R. Simcox." Who we hope is not anywhere in this photo. National Photo Company Collection glass negative. View full size.

New Orleans, Louisiana, circa 1903. "Mule teams on the levee." 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.

Buffalo, New York, circa 1904. "Delaware Avenue." Hitching posts, mounting blocks, ice wagons and gaslight at the dawn of the automobile age. 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.

New York circa 1900. "Operating room in Brooklyn Navy Yard Hospital." 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.