Pamela H. Smith is Associate Professor of History at Pomona College and the Claremont Graduate University. She is the author of The Business of Alchemy: Science andCulture in the Holy Roman Empire, winner of the 1995 Pfizer Prize in the History of Science. Paula Findlen is Professor of History and Director of the Science, Technology and Society Program at Stanford University. She is the author of Possessing Nature: Museums,Collecting, and Scientific Culture in Early Modern Italy, winner of the 1995 Marroro Prize in Italian History and 1996 Pfizer Prize in the History of Science.