Washington, D.C. Central High shell crew on the Potomac at the Key Bridge in 1927. View full size. National Photo Company Collection glass negative.

August 1940 near Bardstown, Kentucky. "Parishioners peeling potatoes for a benefit picnic supper on the grounds of St. Thomas Church." View full size. 35mm negative by Marion Post Wolcott for the Farm Security Administration.

September 1940. "Mountaineer trying to change tire with a fence post as a jack. Up south fork of the Kentucky River, Breathitt County." 35mm nitrate negative by Marion Post Wolcott for the Farm Security Administration. View full size.

"Lincoln Memorial. July 16, 1926." View full size. National Photo Company.

May 30, 1924. "Memorial Day, Arlington National Cemetery." View full size. National Photo Company Collection glass negative, Library of Congress.

June 1942. "Eight units in generator hall of a new addition to TVA's hydroelectric plant at Wilson Dam, Sheffield vicinity, Alabama." Much, if not most, of the energy from the huge Tennessee Valley Authority hydroelectric projects undertaken during the war was used to run the uranium enrichment plants at the government's secret atom-bomb facility in Oak Ridge. View full size. 4x5 Kodachrome transparency by Alfred Palmer for the Office of War Information.

Another circa 1920 shot of the stage and film actress Grace Valentine and that Packard Twin Six roadster. Starting in 1916, Grace was one of the players in a Vitagraph film serial called The Scarlet Runner, about young Christopher Race and his "super car," the Scarlet Runner. (The final installment of the 12 two-reel episodes was "The Car and the Girl.") While unfortunately no prints of the film are known to survive, the story still exists on paper, having been serialized in newspapers of the day. View full size. George Grantham Bain Collection.