June 1942. Tightening a nut on a guide vane servomotor in the Tennessee Valley Authority hydroelectric plant at the Watts Bar Dam. View full size. 4x5 Kodachrome transparency by Alfred Palmer, Office of War Information.

October 1942. Bomb bay gasoline tanks for long-range flights by B-25 bombers await installation at the North American Aviation plant in Inglewood, California. View full size. 4x5 Kodachrome transparency by Alfred Palmer.

October 1942. Workers installing fixtures and assemblies in the tail section of a B-17F bomber at the Douglas Aircraft Company plant in Long Beach, California. View full size. 4x5 Kodachrome transparency by Alfred Palmer.

Another view of Max Schwarz's La Primadora cigar shop at 1153 Broadway in New York, and a closeup of what looks like planking on the sidewalk. View full size. 5x7 glass negative, George Grantham Bain Collection.

March 1943. The giant Santa Fe Elevator near Kansas City, demolished in the 1990s, held 10 million bushels of grain. View full size. 4x5 Kodachrome transparency by Jack Delano, Farm Security Administration/OWI.

November 1909. Cumberland Glass Works at Bridgeton, New Jersey. A young "holding-mold boy" is seen, dimly, to the left [little kid toward the back]. Negroes, Greeks and Italians are being employed in many glass houses. View full size. Photograph and caption by child-labor reformer Lewis Wickes Hine.

November 1909. Blowing bottles. Night shift at the Cumberland Glass Works in Bridgeton, New Jersey. View full size. Photograph by Lewis Wickes Hine.