GREGORY BARTON Permanent Research Fellow in Environmental History, Australian National University, Canberra, Australia BRETT M. BENNETT Lecturer in Modern History, the University of Western Sydney, Australia SABINE CLARKE Wellcome Trust Research Fellow, the Wellcome Unit for the History of Medicine, University of Oxford, UK MATTHEW M. HEATON Assistant Professor of History, Virginia Polytechnic Institute and State University, USA JOSEPH M. HODGE Associate Professor of Modern British and British Imperial History, West Virginia University, USA JOHN GASCOIGNE Professor of History, University of New South Wales, Sydney, Australia PETER H. HOFFENBERG Associate Professor of History, the University of Hawai'i at Manoa, USA ADRIAN HOWKINS Assistant Professor of International Environmental History, Colorado State University, USA CHRISTIAN JENNINGS Assistant Professor in the Department of History, Washington and Lee University, Lexington, USA TAMSON PIETSCH Sir Christopher Cox Junior Fellow at New College, University of Oxford, UK RAJIVE TIWARI Professor of Physics and Mathematics, Belmont Abbey College, North Carolina, USA MICHAEL WORBOYS Director of the Centre for the History of Science, Technology and Medicine and Wellcome Unit for the History of Medicine, Manchester University, UK