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 these achievements. First up is the 1838 work, "Life of Thomas Telford, Civil Engineer." This tome tells the story of the celebrated Scottish engineer who worked on dozens of roads and bridges throughout the late 18th and early 19th centuries. The next item is "A History of the St. Louis Bridge," which tells the complete tale of this remarkable structure. Finished in 1874, the combined road and railway bridge still serves the area today, connecting St. Louis to East St. Louis, Illinois. The last item here was created by the Port Authority of New York in 1928 to tell the story of the Bayonne Bridge. It's a remarkable work, as well, and the photos and illustrations contained within are an engineering historian's dream.