Summer 1938. "New York street scene, Seventh Avenue at West 125th." Fast-forward to 2013 and the Triborough Bridge sign would read "Robert F. Kennedy Bridge"; Seventh Avenue is now Adam Clayton Powell Jr. Boulevard; W. 125th Street is also known as Dr. Martin Luther King Jr. Boulevard. Photo by Jack Allison for the Resettlement Administration. View full size.

August 1924. Washington, D.C. Jeff Davis, self-styled Hobo King (as well as founder of various Hotels de Gink, a chain of hostels for the homeless), standing next to his jalopy and driver. Harris & Ewing glass negative. View full size.

1963. Dick Van Dyke and Mary Tyler Moore on the set of The Dick Van Dyke Show with Jerry Paris directing in front of the studio audience that served as their unbilled co-star. Photo by Earl Theisen for Look magazine. View full size.

June 1863. "Fairfax Courthouse, Virginia. Capt. J.B. Howard, Office of Assistant Quartermaster, Army of the Potomac." A colorful crew, even in monochrome. Wet plate glass negative by Timothy O'Sullivan. View full size.

1922. "Miss Washington in bathing suit." Concealed yet revealed, Evelyn Lewis at the Wardman Park Hotel pool on a nippy day. Harris & Ewing. View full size.

1924. Washington, D.C. "Auto equipped with radio (made for Potomac Electric Power Co.)" Harris & Ewing Collection glass negative. View full size.

C-2 Army blimp makes record flight through fog and storm. Photographed upon arrival at Bolling Field. A powerful searchlight helped guide the craft through heavy fogs.

-- Washington Post, July 29, 1922

July 1922. Washington, D.C. "C-2 dirigible at Bolling Field." The mystery aircraft first seen here. A few months later it met a fiery end in a hangar explosion in Texas. Harris & Ewing Collection glass negative. View full size.