"The Digital Bridges Web site consists of a collection of thirty representative 19th century American bridge engineering monographs, manuals, and documents from the Lehigh University Libraries' Special Collections." The archive provides an interesting retrospective into the beginnings of major bridge projects; the material is complete with high-resolution photographs and text scanned from original...

Look at the form of a trunnion bascule bridge for a moment and you will realize it is a unique and wonderful thing. Engineered structures like this, and thousands of others, represent the best in human ingenuity and discovery. Engineering in the Modern World, a digital collection presented by the Princeton University Digital Library, brings together three remarkable items that document some of...