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:

MODEL PLAYGROUND IN COUNTRY. 1907. 5x7 glass negative, George Grantham Bain Collection. View full size | See every disturbing detail.

Spring 1943. Church at Cerros [Cerro], near Costilla, New Mexico. View full size. 4x5 Kodachrome transparency by John Collier.

"New York City: Horse overcome by heat." Circa 1910. View full size. George Grantham Bain Collection. Hopefully the equine ambulance was on its way.

Night view of the Washington Street produce market, New York City, 1952. View full size. Photograph by Walter Albertin for the World Telegram & Sun.