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.
Looking east on Market Street in San Francisco from the Old Federal Office Building. Note the electric buses. This is quite a bustling scene, but I wonder if the poor pedestrians caught in the center island ever made it all the way across the street. 35mm Anscochrome. View full size.