November 1936. "Pregnant migrant woman living in squatter camp. Kern County, California." Acetate negative by Dorothea Lange for the Farm Security Administration. View full size.

August 1941. "Edgewater Park trailer camp near the Ford bomber plant. Ypsilanti, Michigan." Acetate negative by John Vachon for the Farm Security Administration. View full size.

August 1940. "Street in Upper Mauch Chunk, Pennsylvania." Medium format acetate negative by Jack Delano for the Farm Security Administration. View full size.

August 1941. "FSA borrower working on accounts. Itasca County, Minnesota." Medium format acetate negative by John Vachon for the Farm Security Administration. View full size.

February 1942. Newton County, Missouri. "Boom area on U.S. Highway #71 around Camp Crowder. Housing for construction workers." Acetate negative by John Vachon. View full size.

Feb. 9, 1952. "Grace, Dottie, Shirley, Koleen." With Boots the dog, ensconced on Grace and Hubert Tuttle's emerald sofa in Blue Earth, Minnesota. Kodachrome by Hubert. View full size.

July 1940. Berrien County, Michigan. "Migrant agricultural workers -- 'fruit tramps' harvesting cherries and strawberries. Miserable housing in company shacks, cabins, tents, trucks, abandoned farm buildings, small children in fields with parents. Migrant mother from Arkansas taking a picture of the family before moving on to new work location." Photo by John Vachon for the Farm Security Administration. View full size.

April 1940. "Victorian house. Dubuque, Iowa." The old A.A. Cooper mansion, "Greystone," demolished in 1956. Medium format acetate negative by John Vachon. View full size.

Charleston, South Carolina, circa 1910. "Meeting Street and St. Michael's Church." Seen earlier (by three minutes) here. 8x10 inch glass negative, Detroit Publishing Company. View full size.

January 1941. "Street in the mill district in Pittsburgh, Pennsylvania." Medium format acetate negative by Jack Delano for the Farm Security Administration. View full size.

Washington, D.C., between January 1891 and January 1894. "Beall, Nellie." And her little dog, too. 5x7 inch glass negative from the C.M. Bell portrait studio. View full size.

Circa 1900. "City Hall, Montreal, Quebec." Whose Second Empire facade received a Beaux-Arts makeover after a fire in 1922. 8x10 glass negative, Detroit Photographic Co. View full size.

December 1940. Columbus, Georgia. "Water trough and Y.M.C.A. welcome sign in square in center of town." A cast-iron horse-watering fountain with an attachment for dogs, squirrels, etc. Medium format acetate negative by Marion Post Wolcott. View full size.

New York, 1901. "Central Park -- Bethesda Terrace and Fountain." Starring "Angel of the Waters," a winged bronze by Emma Stebbins dedicated in 1873. Panorama made from two 8x10 inch glass negatives. Detroit Photographic Company. View full size.

March 1940. "Basque sheepherder camped on the range. Dangberg Ranch, Douglas County, Nevada." Photo by Arthur Rothstein for the Farm Security Administration. View full size.