Washington, D.C., circa 1920. "Shrine Temple, Third and E streets N.W." National Photo Company Collection glass negative, Library of Congress. View full size.

"Pennsylvania Avenue at night." A wintry Washington, D.C., scene circa 1926. View full size. National Photo Company Collection glass negative.

"Bureau of Identification, Department of Justice." LOC date: "1916 or 1917." Wall calendar: June 1926. View full size. National Photo Company glass negative.

Washington, D.C., 1920 or 1921. "People's Drug Store, interior, 804 H Street N.E." View full size. National Photo Company Collection glass negative.

September 1942. "Learning how to determine latitude by using a sextant is Senta Osoling, student at Polytechnic High School, Los Angeles. Navigation classes are part of the school's program for training its students for specific contributions to the war effort." View full size. 4x5 Kodachrome transparency by Alfred Palmer.

Washington, 1919 or 1920. "Brewer, Taylor, Gram dancing at Wilson Normal." View full size. National Photo Company Collection glass negative.

"Thomas R. Shipp Co. Atwater Kent window. Woodward & Lothrop." Department store window display of Atwater Kent radio equipment circa 1928 in Washington, D.C. National Photo Company Collection glass negative. View full size.

Washington, D.C. "Jordan Piano Co." 15th and F Streets NW at the Treasury building. The LOC date range here is "1920 or 1921." Who can date the Saturday Evening Post cover? National Photo Company glass negative. View full size.