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.
1956 Cal Poly Homecoming Parade, San Luis Obispo, Calif. The Soils Club float "A New Science." Shot by my brother on 35mm Ektachrome. View full size.