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.
Detroit circa 1906. "Detroit Publishing Co., northwest view." Note the greenhouse-style glass to the right employing sunlight for printing and perhaps enlargement, as well as the unusual windows to the left. In the early years of the 20th century, the company was one of the world's biggest producers of color postcards. Panorama made from two 8x10 inch glass negatives. View full size.