John Slater is Associate Professor in the Department of Spanish and Portuguese at the University of California - Davis, USA. MarÃ-aluz LÃ3pez-Terrada is Senior Researcher (Investigadora cientÃ-fica) at the Instituto de Historia de la Medicina y de la Ciencia LÃ3pez Piñero, of the Spanish National Research Council (CSIC, Valencia), Spain. José Pardo-Tomàs is Senior Researcher at the Department of History of Science in the Institucio ’Milà i Fontanals’ (CSIC, Barcelona), Spain.