1942. Chrysler Corporation plant at Highland Park, Detroit. "Applying automobile production methods to machining of 40 mm. anti-aircraft gun barrels in a former automobile plant. Five cutting instruments work at the same time. Under the old single-operation methods of gunmaking, only one of these could work at one time. Automobile workers are proud of the improvement." Medium format safety negative by Alfred Palmer for the Office of War Information. View full size.

1942. Chrysler Corporation plant at Highland Park, Detroit. "Conversion. Here, in a former automobile plant, 40 mm. anti-aircraft gun barrels are machined and made ready for front-line duty. Since they must shoot fast-moving objects at great distances, they must be finished to the very finest of tolerances." Medium format negative by Alfred Palmer for the Office of War Information. View full size.

"Amplifiers at Bolling Field, 1921." Two giant horns with ear tubes, evidently designed to listen for approaching aircraft. View full size. National Photo Co.

Manhattan, looking northeast from atop the Singer Building in 1908. 5x7 glass negative, George Grantham Bain Collection. View full size.

April 1943. South Water Street freight depot of the Illinois Central Railroad at Chicago. View full size. 4x5 Kodachrome transparency by Jack Delano.

February 1937. Gee's Bend, Alabama. Descendants of former slaves of the Pettway Plantation. They are still living under primitive conditions there. Meat in sacks hangs from tree limbs to be cured. Medium format nitrate negative by Arthur Rothstein for the Farm Security Administration. View full size.

Feb. 20, 1925. Rep. P.B. O' Sullivan, Gen. Billy Mitchell and Maj. Henry B. Clagett with biplane ("Plover") at Bolling Field. View full size. National Photo Co.