"Clean Up Day" at the Deadwood Terra Gold Stamp Mill near Terraville in the Dakota Territory. Ore fed into the mill is stamped, or crushed, to prepare it for the chemical extraction of gold. Photograph by John C.H. Grabill. View full size.

Children play in a wading pool at a play center at the Red Hook housing development, Brooklyn, New York. The charge to use the pool is nine cents for children, 25 cents for adults. Photograpy by Arthur Rothstein, June, 1942. View full size.

1923. Swimmers at the Wardman Park Hotel pool in Washington, D.C. National Photo Company Collection glass negative. View full size.

A poster for the Federal Theatre Project presentation of "Gaieties of 1936" at the Greek Open Air Theatre, Vermont Avenue at Griffith Park in Los Angeles. View full size

Children asleep on a bed during a square dance in McIntosh County, Oklahoma. Photograph by Russell Lee for the Farm Security Administration Office of War Information, c. 1939. View full size.

The orchestra at a square dance in McIntosh County, Oklahoma. Photograph by Russell Lee for the Farm Security Administration Office of War Information, c. 1939. View full size.

Couples at square dance in McIntosh County, Oklahoma. Photograph by Russell Lee for the Farm Security Administration Office of War Information circa 1939. View full size.

A young model lies in bed with a book. Photo by Fitz W. Guerin, between 1900 and 1903. View full size.

A young woman models, wearing a cowgirl outfit and holding a rope. Photo by Fitz W. Guerin, c. 1902. View full size.

Workers on a Chloro boat, which was used for disinfecting large outdoor swimming areas. This photo was likely taken in the Washington, D.C., area. Photo from the National Photo Company collection, 1921. View full size.

The children of U.S. cabinet members at Easter, April 1922. Photo from the National Photo Company collection. View full size.

Two children talk to a blacksmith standing in the doorway of his forge. Photograph by Frances S. Allen, c. 1900. View full size.

Bill Snyder and Hattie at the Central Park elephant house in 1922. View full size. 5x7 glass negative, George Grantham Bain Collection.

December 5, 1923. Probably Washington, D.C. View full size. 4x5 glass negative, National Photo Company Collection, Library of Congress.

August 1938. "Itinerant photographer in Columbus, Ohio." View full size. 35mm nitrate negative. Photograph by Ben Shahn, Farm Security Administration.