Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
Vintage photos of:
Washington, D.C., circa 1931. "Fifteenth Street at Pennsylvania Avenue." Note the traffic lights, which made their D.C. debut in 1926, as well as the traffic-cop gazebo at center ("NO LEFT TURN") and streetcar switch tower to its left. Harris & Ewing Collection glass negative. View full size.