Imperial Valley, California, March 1937. "One of a Mexican field gang of migratory laborers thinning and weeding cantaloupe plants. The young plants are capped with waxed paper spread over a wire wicket to protect against cold and accelerate growth. The laborers' wages are 30 cents an hour." View full size. Medium-format nitrate negative by Dorothea Lange for the FSA.

November 1941. "Slag runoff from one of the open-hearth furnaces at Republic Steel in Youngstown, Ohio. Slag is drawn off the furnace just before the molten steel is poured into ladles for ingotting." View full size. 4x5 Kodachrome transparency by Alfred Palmer for the Office of War Information.

March 1937. "Unemployed family from the Rio Grande Valley, Texas, camped on a river bottom near Holtville, California." View full size. Medium-format nitrate negative by Dorothea Lange for the Farm Security Administration.

Summer 1942. "Good citizenship and plain common sense. This man is performing a duty every car owner owes to himself and to our fighting men. In having his car adjusted to prevent excessive tire wear -- and in observing the simple rules that make tires last longer -- he is making a valuable contribution to our war effort. The man who wastes rubber is a poor citizen and blind even to his own personal interests." View full size. From photos by Martha McMillan Roberts, Howard Hollem, Albert Freeman and Howard Liberman for the Office of War Information.

New York, summer 1938. "Street vendor of shaved ices." View full size. Medium format nitrate negative by Jack Allison for the Farm Security Administration.

November 1911. Chicopee, Mass. Stanislaus Matthew, 30 Cabot Street (lefthand boy). Warren Butman, Nonotuck Street. Has worked in spinning room at Dwight Manufacturing since Monday. View full size. Photo by Lewis Wickes Hine.

October 1935. Our third shot of Red House, West Virginia, youngsters on the way to school by truck. 35mm negative by Ben Shahn for the FSA. View full size.