Sunday, August 9, 1925. "KKK services." The "services" at the Capital Horse Show grounds in Arlington, complete with flaming 80-foot cross, wrapped up the Klan's weekend in Washington. Some 100,000 people from all over the country were thought to have attended. National Photo Co. glass negative. View full size.

A gray 1912 day in Washington, D.C. "Woodward & Lothrop department store trucks." Harris & Ewing Collection glass negative. View full size.

July 18, 1925. Laurel, Maryland. "Race car driver Peter De Paolo and Chas. Allen, Laurel bicycle races." National Photo Company glass negative. View full size.

New York. October 13, 1909. The Federation of Jewish Farmers of America exhibit at the Educational Alliance building, East Broadway and Jefferson Street. 8x10 glass negative, George Grantham Bain Collection. View full size.

Washington, D.C., circa 1917. "Washington Gas Light holders at 26th and G streets N.W." These relics of the gaslight era ("two of Washington's biggest stinkers") were scrapped around 1947. Just about every city of any size in the latter half of the 19th century had its "gashouse district" -- a rough neighborhood dominated by smelly holding tanks for the municipal gas plant, where coal was gasified to make "city gas" (generally either "coal gas" or "water gas," depending on the process) for illumination. Harris & Ewing Collection glass negative. View full size.

Washington, D.C., 1914. "Henry Lincoln Johnson, Recorder of Deeds." Harris & Ewing Collection glass negative, Library of Congress. View full size.

August 8, 1925. "Dr. H.W. Evans, Imperial Wizard." More from the KKK konklave. National Photo Company Collection glass negative. View full size.