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:

November 1913. Shreveport, Louisiana. "Percy Neville, 11 years old. Messenger boy #6 for Mackay Telegraph Company. He has been messenger for different companies for four years. Goes to the Reservation [red light district] every day." View full size. Photograph and caption by Lewis Wickes Hine.

November 1909. "Night scene, Wheaton Glass Works." Blowing bottles in Millville, New Jersey. View full size. Photograph by Lewis Wickes Hine.

Rat meets rat catcher in New York circa 1920. View full size. 5x7 glass negative, George Grantham Bain Collection, Library of Congress.

"Mermaid Club, Philadelphia." Members in bathing suits circa 1920. 5x7 glass negative, George Grantham Bain Collection. View full size.

July 30, 1913, New York. Suffragist Harriot Stanton Blatch in the front seat of a Cole touring car with (from left) Susan Fitzgerald, Emma Bugbee and Maggie Murphy. View full size. 5x7 glass negative, George Grantham Bain Collection.

December 1942. Proviso classification yard of the Chicago & North Western Railroad. View full size. 4x5 Kodachrome transparency by Jack Delano.

September 1908. "Invited guests going to Roosevelt house on foot and by carriage" at Sagamore Hill, the president's estate near Oyster Bay, Long Island. View full size. 5x7 glass negative, George Grantham Bain Collection.