FUTURE SHOCK
One of the first buildings expressly intended to grow was the main library of the University of Pennsylvania, which opened in 1891. Frank Furness designed a head-and-tail building, with a magnificent four-story reading room as the head, and the stacks as an ever-expanding tail. The three-story stacks housed 100,000 books, but the end wall was removable so that the stacks could be extended, bay by bay—up to three times their length—increasing their size and capacity. Furness was correct about the need to accommodate more books, but he was wrong about the expansion. In 1915, the university erected an unrelated building on the site of the future stacks,