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:
"Watts Bar steam plant. Large opening leads to lobby which gives access to stairs, overlook balcony, and toilets. Lobby is separated from turbine hall by a similar glazed opening. A direct view can be had from outside toward impressive generators. Note hooded slits which take place of windows in boiler room. Design facilitates blackout." View full size. Circa 1942; photographer unknown.