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:
Circa 1907. "Aerial bridge. Duluth, Minnesota." Suspended Car Transfer over the Duluth Ship Canal. The gondola could carry 60 tons of cargo across the 300-foot channel with minimal obstruction of the shipping lane. After modification for service as a vertical lift, the span became known as the Aerial Lift Bridge. 8x10 dry plate glass negative, Detroit Publishing Company. View full size.
Feb. 22, 1908. "Three New York-Brooklyn bridges from Brooklyn." An amazingly detailed panorama of New York recorded by George Grantham Bain. Our 3100 pixel wide version (view full size), detailed as it is, is less than a quarter the size of the hi-res scan of the original 8x10 inch glass negative. From the left: Brooklyn Bridge, Manhattan Bridge (under construction) and Williamsburg Bridge.