What was the one millionth book acquired by the Purdue Libraries?
In 1969, the Purdue Libraries acquired its one millionth volume – a rare 1617 edition of Copernicus’ On the Revolutions of Heavenly Bodies (De Revolutionibus Orbium Caelestium). The book formerly belonged to 18th century French astronomer Jerome de Lalande. In this work, Copernicus expounded upon his theory that the sun is the center of the solar system.
