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.
Hundreds of black-and-white photos of battleships, dreadnoughts, riverboats, paddle wheelers, cruise ships, ocean liners and Great Lakes freighters and ore carriers. Photos of suspension and truss bridges including the Brooklyn Bridge, Manhattan Bridge, Williamsburg Bridge and 59th Street Bridge.