Washington, D.C., in 1926. "Robey Motor Co. -- 1429 L Street." As long as we're downtown, let's pick up a tractor. National Photo glass negative. View full size.

Circa 1900. "State Street & Capitol -- Albany, New York." 6½x8½ inch dry plate glass negative, Detroit Publishing Company. View full size.

Denishawn dance company founder Ruth St. Denis and husband Ted Shawn with garden party guests (bridesmaids? caterers? vestal virgins?), among them the modern dance pioneers Louise Brooks and Martha Graham. View full size.

Washington, D.C., circa 1920. "Swartzbaugh, C.E., Mrs." Who'll be the first to write on her wall? Harris & Ewing Collection glass negative. View full size.

"Post and Montgomery streets, corner of Market." Another view of San Francisco after the devastating earthquake and fire of April 1906. 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.

Philadelphia circa 1907. "Broad Street north from Locust with view of City Hall." 8x10 inch glass negative, Detroit Publishing Company. View full size.

"Picnic at Austin -- Vern, Ruth, Ida & Pete -- 7 Sept. 1952." The latest episode of Minnesota Kodachromes is back at the park. Point me to the potato salad! Color slide by Hubert Tuttle and his Kodak Signet 35. View full size.

"Union Square with Naval Monument and St. Francis Hotel, San Francisco." Aftermath of the April 18, 1906, earthquake and fire. 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.

Washington, D.C., circa 1920. "Iden, V. Gilmore, Mrs." We sense a charity play in the offing, and vaguely recall having plans every night that month. (Oh, and: Ouch.) 8x10 inch glass negative, Harris & Ewing Collection. View full size.

        The shutter clicked as she fingered the cold steel of the pistol in her purse. "No one suspects," she muttered under her breath, fixing her gaze on the Nazi spy at the front of the coach ...

April 1943. "Baltimore, Maryland. Crowded bus carrying people to work at 8 a.m." Photo by Marjory Collins for the Office of War Information. View full size.

July 1939. "The main street, Chatham Avenue, of Siler City, North Carolina." Photo by Dorothea Lange for the Farm Security Administration. View full size.

1904. "Produce Exchange, New York, N.Y." George Post's commodity exchange on Broadway, completed in 1884 and the subject of an article in yesterday's New York Times. 8x10 inch glass negative, Detroit Publishing Co. View full size.

July 1939. "Appliqued embroideries for sale on street in front of ten cent store. Saturday afternoon. Siler City, North Carolina." Medium format negative by Dorothea Lange for the Farm Security Administration. View full size.

Washington, D.C., 1920s. "Gaynor, John F., Mrs." Who looks like someone you would want to have at your party. Harris & Ewing glass negative. View full size.

Colorized version of the Currin Grocery in Granville County, North Carolina, photographed by Dorothea Lange in July 1939. View full size.