National Geographic : 1975 Nov
Match-head copy of the Gettysburg Address, printed in Tokyo in 1965, is one of the world's smallest books (right). The Library's miniature-book collection contains more than a thousand volumes, each less than four inches tall. At the other extreme, John James Audubon's "elephant folio" of American birds stretches four feet wide (below). Fighting time and decay, 37 restoration experts work to preserve the Library's rare books, manuscripts, and prints, patching tears and cleaning stains page by page. "Aging ovens" in the Library's laboratory hurry time's effects on paper and help chemists predict which treatments are best. Microfilm replaces books too brittle to use.