"Organ grinder, New Orleans, 1924." Nitrate negative by Arnold Genthe. View full size.

September 1940. "Miners' union hall. Silverton, Colorado." Medium format acetate negative by Russell Lee for the Farm Security Administration. View full size.

May 1940. "Nurse giving instructions to son of migratory laborer as to how to take medicine. Agua Fria migratory labor camp, Arizona." Acetate negative by Russell Lee. View full size.

July 1938. "View of city of Pittsburgh, Pennsylvania." The Wabash Bridge over the Monongahela River. Medium format acetate negative by Arthur Rothstein. View full size.

July 1938. "Pittsburgh. View of the city from Homestead." Medium format acetate negative by Arthur Rothstein for the Farm Security Administration. View full size.

September 1940. "Jail. Silverton, San Juan County, Colorado." Medium format acetate negative by Russell Lee for the Farm Security Administration. View full size.

September 1940. "Former miners' hospital, now the post office at Telluride, Colorado." Acetate negative by Russell Lee for the Farm Security Administration. View full size.

September 1940. "Detail of front of building. Silverton, Colorado." Medium format acetate negative by Russell Lee for the Farm Security Administration. View full size.

July 1940. "Entrance to the cemetery at Penasco, New Mexico." Medium format acetate negative by Russell Lee for the Farm Security Administration. View full size.

July 1940. "Chamisal, New Mexico. Spanish-American boy with chest which he carved. These people are adept in many of the handcrafts." Acetate negative by Russell Lee. View full size.

September 1940. "San Juan County Courthouse. Silverton, Colorado." Medium format acetate negative by Russell Lee for the Farm Security Administration. View full size.

September 1940. "Locomotives in roundhouse. Durango, Colorado." Medium format acetate negative by Russell Lee for the Farm Security Administration. View full size.

September 1940. "Old Imperial hotel built in Silverton, Colorado, during its heyday." Medium format acetate negative by Russell Lee for the Farm Security Administration. View full size.

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.

December 1937. "Water tower on railroad through Jennings, Maryland. The train now runs only once a week." Medium format acetate negative by Arthur Rothstein. View full size.