Varia No 229, 2009/4 - pagesPages 3 to 11Editorial. What Do Social Sciences Have to Do with the Horse?By Jean-Pierre DigardPages 13 to 39Competition and Coexistence: The Motorization of Land Mobility and the Substitution of the HorseBy Gijs MomPages 41 to 59The Interactions between Equestrian Activities and Social Change in France Since the 1960sBy Catherine Tourre-MalenPages 61 to 77The Battle for Control of the Regulating Institution of Physicians in France, 1944–1950By Donna EvlethPages 79 to 101Developing Organ Transplant: The Tensions between Public Health and Markets in Human Goods in France since the 1970sBy Sophie ChauveauPages 103 to 113The Constructivism of the Historian. Revisiting a Text by Brigitte GaïtiBy Gabriel Galvez-BeharPages 115 to 138ReviewsPages 139 to 143Information and Initiatives