October 1942. Inglewood, Calif. "Parts are marked with this pneumatic numbering machine in North American Aviation's sheet metal department." 4x5 Kodachrome transparency by Alfred Palmer, Office of War Information. View full size.

July 24, 1929. "Norma Shearer (Mrs. Irving Thalberg)." The Oscar-winning actress at the White House. National Photo Co. glass negative. View full size.

Washington, D.C., circa 1925. "Barbershop, Investment Building," 15th and K Streets N.W. National Photo Company Collection glass negative. View full size.

December 31, 1921. "Miss Texanna Loomis." Mary Texanna Loomis, founder and proprietor of the Loomis Radio School in Washington, D.C. National Photo Company Collection glass negative, Library of Congress. View full size.

Washington, D.C., in 1920. "Sprague. Decatur Heights." National Photo Company Collection glass negative. View full size.

1864. Chattanooga, Tennessee. "Boxcars and depot with Federal cavalry guard beyond. From photographs of the War in the West. Battle of Chattanooga, September-November 1863. Photograph probably taken the following year, when Chattanooga was the base for Sherman's Atlanta campaign." Wet plate glass negative, half of stereo pair, photographer unknown. View full size.

Washington, D.C., circa 1921. "Loomis Radio School." Mary Texanna Loomis, founder and owner of the school, instructing a class. View full size.