August 1864. "Group of men of Company D, U.S. Engineer Battalion, in front of Petersburg." Wet plate glass negative, photographer unknown. View full size.

October 1942. "Lieutenant 'Mike' Hunter, Army test pilot assigned to Douglas Aircraft Company, Long Beach, California." 4x5 Kodachrome transparency by Alfred Palmer for the Office of War Information. View full size.

Washington, D.C., circa 1923. "Hopwood furniture, 8th and K." A slice of life from the intersection of Then and Now. National Photo glass negative. View full size.

December 15, 1931. New York. "River House, 52nd Street and East River. View of power house." 5x7 safety negative by Gottscho-Schleisner. View full size.

"Madame Lubouska, National American Ballet, 1924." The Russian dancer Desiree Lubowska, whose claim to fame seems to have been the popularization of "Egyptian" poses around 1915. National Photo glass negative. View full size.

"Graf Zeppelin over Capitol." The German airship on its visit to Washington in October 1928. National Photo Co. Collection glass negative. View full size.

Washington, D.C., circa 1920. "Refrigeration box for parcel post, City Post Office." National Photo Company Collection glass negative. View full size.

May 7, 1924. "Three models from Washington's spring fashion show snapped at Arlington Beach." National Photo Company glass negative. View full size.

Washington, D.C., circa 1922. "Security Savings & Commercial Bank, 9th and G." National Photo Company Collection glass negative. View full size.

"World Series, Griffith Stadium, 1925." The headline when it was all over: PIRATES MAKE NATS WALK PLANK. National Photo Co. View full size.

Circa 1910. "U.S. Senate pages." Harris & Ewing glass negative. View full size.

1911. "The girl works all day in a cannery." Location unspecified but possibly Mississippi. Photograph by Lewis Wickes Hine. View full size.

July 1940. Berrien County, Michigan. "Migrant fruit workers from Arkansas." 35mm nitrate negative by John Vachon for the FSA. View full size.

September 1910. North Pownal, Vermont. "Clarence Wool, 11 years. Spinner in North Pownal Cotton Mill. Worked only during vacation." Photograph (original glass negative) and caption by Lewis Wickes Hine. View full size.

July 1940. "Near Shawboro, North Carolina. Group of Florida migrants on their way to Cranberry [i.e., Cranbury], New Jersey, to pick potatoes." Medium-format safety negative by Jack Delano for the Farm Security Administration. View full size.