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:

"Crowd at Ebbets Field. Oct. 5, 1920." In the first game of the 1920 World Series between the Indians and Dodgers, the final score was Cleveland 3, Brooklyn 1. View full size. 5x7 glass negative, George Grantham Bain Collection.

October 1935. Cotton pickers in Pulaski County, Arkansas. View full size. 35mm nitrate negative by Ben Shahn for the Farm Security Administration.

More from the 1939 carnival in Bozeman, Montana. View full size. 35mm negative by Arthur Rothstein, who by the time the decade was out had photo- graphed pretty much every square inch of North America. Anyone got a dime?

July 1941. Cadillac Fleetwood parked on a Chicago street. View full size. 35mm nitrate negative by John Vachon for the Farm Security Administration.

July 1938. Back alley showing housing conditions in Ambridge, Pennsylvania. View full size. 35mm nitrate negative by Arthur Rothstein for the FSA.

January 1939. An evicted sharecropper among his possessions in New Madrid County, Missouri. View full size. 35mm nitrate negative by Arthur Rothstein.

July 1938. Another view of "housing conditions in Ambridge, Pennsylvania, home of the American Bridge Company." View full size. Photo by Arthur Rothstein. While I guess the point here is the decrepit nature of the neighborhood, it looks to have been a great place to grow up. Like something from a Neil Simon play.