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.

March 23, 1927. Our second look at Sally Phillips, Fanny Dial, Frances Gore and Georgiana Joyes somewhere on the Potomac. View full size. National Photo.

March 23, 1927. Washington, D.C. "Sally Phillips, Fanny Dial, Frances Gore, Georgiana Joyes." View full size. National Photo Company glass negative.

The Francis Scott Key Bridge over the Potomac under construction circa 1920. View full size. National Photo Company Collection glass negative.

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.

Traffic report for the Golden Gate Bridge, Tuesday August 2, 1955: there isn't any. We're in the Hudson on the way to Golden Gate Park and Playland at the Beach. My brother's 35mm Tri-X negative.

May 1864. "Virginia. Pontoon bridge across the North Anna River below Taylor's Bridge." Wet plate glass negative by Timothy O'Sullivan. View full size.

San Francisco Bay, November 30, 1955. The car ferry Klamath heading west to San Rafael from Richmond. We're on board another one heading east. Looking south from the starboard side of our vessel, we'd see this view of the bridge that, when completed, would end the ferry service. My brother shot this on 35mm Kodachrome. But I was there on the boat with him. View full size.

The Richmond-San Rafael bridge on San Francisco Bay under construction, November 30, 1955. Shot by my brother on 35mm Kodachrome from a car ferry heading east toward Richmond. Smoke at left is from a San Rafael-bound ferry passing out of camera range to the north. View full size.

New York, 1917. "Washday on landship Recruit." Sailors doing their laundry on the Navy's pretend battleship moored at Union Square, used for recruiting during World War I. In back is the Automatic Vaudeville penny arcade, two of whose backers -- Marcus Loew and Adolph Zukor -- went on to found Metro-Goldwyn- Mayer and Paramount Pictures after a few years in the nickelodeon business. 5x7 glass negative, George Grantham Bain Collection. View full size.

"Yocum canoe house, Arlington Beach Park, Virginia, 1925." View full size. National Photo Company Collection glass negative, Library of Congress.

New York, 1917. "Mascots aboard Recruit." Furry/feathery companions for sailors on the "landship" in Union Square. View full size. G.G. Bain Collection.

New York, 1917. "Aboard the Recruit." Our first glimpse of life on the "landship" U.S.S. Recruit, a wooden destroyer set up in Union Square as a Navy recruiting station. For our marooned sailors there was a phonograph, dancing and a pet goat. 5x7 glass negative, George Grantham Bain Collection. View full size.

New York, 1917. "Landship Recruit on Union Square." The U.S.S. Recruit, a wooden battleship erected by the Navy, served as a World War I recruiting station at Union Square from 1917 to 1920, when it "set sail" for Coney Island. This is the first in a series of photographs depicting life around and aboard the landlocked boat. 5x7 glass negative, George Grantham Bain Collection. View full size.

September 1938. "Construction of new bridge, Tygart Valley Homesteads, West Virginia." View full size. 35mm nitrate negative by Marion Post Wolcott.