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.
July 1942. "Wiring a junction box on the firewall for the right engine of a B-25 bomber at the North American Aviation plant in Inglewood, California. Forward of this wall will be mounted one of two 1,700-horsepower Wright Whirlwind engines." 4x5 Kodachrome transparency by Alfred Palmer. View full size.