The CPHM organizes a series of conferences on relief photography. -From 14:15 to 15:00 a first conference moderated by Bernard CHÉREAU will have as a subject the brothers Léon and Hippolyte JOUVIN and the trade of stereograms. -From 15:00 to 15:45 a second conference moderated by Robert MOREAU will present the invention of the industrial genius Jules RICHARD (1848-1930) creator of cameras for shooting and visualization of stereophography.