Washington, D.C., 1906. "Georgetown football (junior)." 8x10 inch glass negative, Harris & Ewing Collection. View full size.

September 26, 1925. "Georgetown-Drexel Institute game." National Photo Company Collection glass negative. View full size.

Washington circa 1925. The semi-legible caption on this glass negative has been transcribed as "St. Gabriel's [...] fete." National Photo Company. View full size.

"Inauguration of Aero Mail service. Polo Field mechanics." On May 15, 1918, "America's first aerial mail service was put into operation when aeroplanes piloted by Army aviators carried consignments of mail from New York and Philadelphia to Washington, and from Philadelphia to New York." View full size.

Washington, D.C., circa 1925. "Girls' rifle team of Drexel Institute." National Photo Company Collection glass negative. View full size.

"Inaugural Ball. March 4, 1925." And Calvin Coolidge could have danced all night. National Photo Company Collection glass negative. View full size.

Union Station in Washington, D.C., circa 1925, with a baseball game next door. National Photo Company Collection glass negative. View full size.

Preparations for the inauguration of Woodrow Wilson in 1913. "Inaugural stands. Court of Honor before White House." Building at the left is the Treasury at 15th Street and Pennsylvania Avenue. Harris & Ewing. View full size.

"Harding inauguration, 1921." Harris & Ewing glass negative. View full size.

February 2, 1924. "Home Sweet Home being moved to its permanent location, passing the south grounds of the White House. The building is to be used as a headquarters for the Girl Scouts of America." After eight months in Sherman Square the building, a "model American home" put up by the National Federation of Women's Clubs, was moved ("by hefty mules," said the Washington Post) to new digs at 18th Street and New York Avenue. The "snug little house" (weight 150 tons) was a replica of the Long Island residence of lyricist John Howard Payne, who 100 years earlier had written "Home Sweet Home." View full size.

February 27, 1929. Washington, D.C. "Testing installation for radio broadcast of the Inauguration." On the eve of the Great Depression, a sound check for the presidency of Herbert Hoover. National Photo Co. View full size.

1916. Washington, D.C. "Post Office Department, opening machine." If you have sharp eyes and don't mind a little sleuthing, there is an interesting story to be gleaned here. Harris & Ewing Collection glass negative. View full size.

Washington, D.C., 1916. "Post Office Department, sealing machine." Which is a Mailometer. Harris & Ewing Collection glass negative. View full size.

Washington, D.C., circa 1916. "Slaves reunion. Lewis Martin, age 100; Martha Elizabeth Banks, age 104; Amy Ware, age 103; Rev. Simon P. Drew, born free." Cosmopolitan Baptist Church, 921 N Street N.W. View full size.

October 1863. Bealeton, Virginia. "John Henry, servant, at headquarters, 3d Army Corps, Army of the Potomac." Wet-plate glass negative. View full size.