JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. Ohio State University Press is collaborating with JSTOR to digitize, preserve and extend access to Journal of Money, Credit and Banking. FOR ALMOST AS LONG as money has been the object of systematic study, Gresham's law bad money drives out good has been recognized as one of money's governing principles. Now, however, doubts have arisen concerning the validity of this venerable principle. In their provocative, theoretical reappraisal of Gresham's law, Rolnick and Weber (1986) maintain that bad money and good money will typically circulate together, bad money at its face value and good money at a price exceeding its face value. Bad money, they say, rather than driving good money out, drives it to a premium. This paper examines the leading cases in nineteenth-century U.S . monetary history, looking for evidence of cocirculation. No such evidence appears. Money circulated by tale, not weight.