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:
Pittsburgh, Pennsylvania, circa 1900-1910. "Duquesne Incline Railway." Mount Washington and the Ohio River feature in this view, which includes the Point Bridge, a paint and varnish factory, a riverboat and the Graham Nut Company. 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.