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.
A glimpse at the industrial side of Washington circa 1925, labeled "Capitol Refining Co. plant." This tank farm, where the Pentagon stands today, was described at the time as being in "Relee, Alexandria County, just south of the highway bridge." National Photo Co. Collection glass negative. View full size.