Fifty years ago today in Washington on the occasion of Martin Luther King Jr.'s famous address under the gaze of Abraham Lincoln, signer of the Emancipation Proclamation 100 years earlier.

August 28, 1963. "Emancipator looking down on demonstrators. Participants in the March on Washington in front of the Lincoln Memorial and massed along both sides of the Reflecting Pool, viewed from behind Abraham Lincoln statue." Photo by James K. Atherton for United Press International. View full size.

Circa 1917. "Motor cars in New Zealand Farmers Co-Op Garage." Glass plate by Samuel Heath Head, Christchurch. View full size.

Washington, D.C., circa 1920. "Victory Tire Co., 14th Street N.W." Guaranteed 6,000 miles! National Photo Company glass negative. View full size.

May 1941. "In the convict camp in Greene County, Georgia." A show of hands. Photo by Jack Delano for the Farm Security Administration. View full size.

October 1937. "Family of Joe Kramer, farmer near Williston, North Dakota." Photo by Russell Lee for the Resettlement Administration. View full size.

Washington, D.C., circa 1919. "U.S. Fuel Administration." What seems to be the Department of Coal. Harris & Ewing Collection glass negative. View full size.

1939. "Glascock House, 1109 21st Ave., Tuscaloosa, Alabama. Built 1844 for John Glascock of Virginia." Photo by Frances Benjamin Johnston. View full size.

Detroit circa 1912. "Elliott, Taylor & Woolfenden, first floor." In Dry Goods: New Spring Ginghams and Fine Scotch Zephyrs, as well as a tempting array of Notions. 8x10 inch glass negative, Detroit Publishing Company. View full size.

"Connor washing machine with motorized wringer." Circa 1950 photo by the Gordon Burt studio in Wellington, New Zealand. View full size.

Aug. 28, 1963 -- fifty years ago. "March on Washington for Jobs and Freedom." Photo by Marion S. Trikosko for U.S. News & World Report. View full size.

An unidentified family just arriving at the airport on a Transcontinental & Western Airlines "Sky-Club" flight. From my collection of negatives. View full size.

Circa 1906. "Union Station, Indianapolis." If we step on it (but not in it) we just have time to make the 3:25 to Terre Haute. 8x10 glass negative. View full size.

1925. "Glen Echo Park Co." Picnic tables at the Montgomery County, Maryland, amusement park. National Photo Company glass negative. View full size.

Washington, D.C., circa 1925. "Chestnut Farms Dairy." The business end of milk production. National Photo Co. glass negative. View full size.

June 8, 1968. "Funeral cortege of Robert F. Kennedy." Mourners atop a pink DeSoto viewing RFK's funeral train as it made its way from New York to Washington. 35mm Kodachrome transparency from photos by Paul Fusco and Thomas Koeniges for Look magazine. View full size.