June 1942. "Kenneth C. Hall with his wife, Helen Louise, and daughter Peggy. Mr. Hall is a foreman in the hot rolling mill at the Reynolds Metals Company, an aluminum plant using Tennessee Valley Authority electricity. He lives in this TVA defense house at Sheffield, Alabama." View full size. Medium format negative by Arthur Rothstein for the Office of War Information.

1941. Belt drive for the metal cutter at Gichner Iron Works in Washington, D.C. Photograph by Baker for the Office for Emergency Management. View full size.

March 1943. "Activity in the Santa Fe R.R. yard, Los Angeles, Calif. All switch lights, headlights and lamps have been shaded from above in accordance with blackout regulations. The heavy light streaks are caused by paths of locomotive headlights and the thin lines by lamps of switchmen working in the yard. Santa Fe R.R. trip." View full size. 4x5 Kodachrome transparency by Jack Delano, who seems to have been among the earliest photographers of light trails in color.

1943. Sailors at the natural history museum in Washington, D.C. View full size. Medium-format negative by Esther Bubley for the Office of War Information.

October 1942. Glenview, Illinois. "Transfusion bottles containing intravenous solution are given final inspection by Grace Kruger, one of many women employees at Baxter Laboratories. When her brother left Baxter to join the Merchant Marine, Miss Kruger, a former life insurance clerk, took his place." 4x5 Kodachrome transparency by Howard R. Hollem for the OWI. View full size.

March 1944. Washington, D.C. St. Patrick's Day dance at the Washington labor canteen, sponsored by the United Federal Workers of America, Congress of Industrial Organizations. View full size. Medium format safety negative by Joseph A. Horne for the Office of War Information.

Washington, 1943. "United Nations Fight for Freedom: Colored, white and Chinese Boy Scouts in front of Capitol. They help out by delivering posters to help the war effort." View full size. 4x5 Kodachrome transparency by John Rous for the Office of War Information. What photo expert out there can tell us about the numbers on these Kodachromes -- how and at what point in the manufacturing/ exposure/ developing process they were made, and what they signify.

Bethlehem-Fairfield Shipyards, Baltimore. 1941. "Between the ways of this large Eastern shipyard run tracks for flatcars carrying materials or sections to be hoisted onto the deck of Liberty ships under construction." View full size. Medium format nitrate negative by Alfred Palmer.

October 1942. Inglewood, California. "Young woman employee of North American Aviation working over the landing gear mechanism of a P-51 fighter plane." View full size. 4x5 Kodachrome transparency by Alfred Palmer.

February 1943. "Mrs. Mary Betchner measuring 105mm howitzers at the Milwaukee, Wisconsin, plant of the Chain Belt Company. Her son is in the Army; her husband and daughter are in war work." View full size. 4x5 Kodachrome transparency by Howard Hollem for the Office of War Information.

December 1943. "Hugh and Lynn Massman sightseeing on their first day in Washington. Their baby is being taken care of in the nursery at the United Nations service center." Photo: Esther Bubley, Office of War Information. View full size

October 1942. "Riveting team working on the cockpit shell of a C-47 transport at Douglas Aircraft Company, Long Beach, Calif. The versatile C-47 performs many important tasks for the Army. It ferries men and cargo across the oceans and mountains, tows gliders and brings paratroopers and their equipment to scenes of action." View full size. 4x5 Kodachrome transparency by Alfred Palmer for the Office of War Information. Happy Valentine's Day from Shorpy!

June 1942. Army tank driver at Fort Knox, Kentucky. View full size. 4x5 Kodachrome transparency by Alfred Palmer for the Office of War Information.

December 1942. "Chicago, Illinois. Work goes on twenty-four hours a day at this Chicago and North Western Railroad yard." View full size. Medium format negative by Jack Delano for the Office of War Information.

Spring 1944. Another target for Operation Strangle. "French airmen hit a pinpoint target. Flying with the Mediterranean Allied Air Forces under the tricolor of France, the Frenchmen split a vital rail bridge 600 feet long and 15 feet wide at the Piteccio viaduct in central Italy. On the wing of the American-made B-26 bomber may be seen the roundel of the French Air Force." View full size.