An excerpt from the cover of the "supplément littéraire illustré du Petit Parisien" dated November 2, 1902, for the fiftieth anniversary of the demonstration by Léon Foucault of the rotation of the Earth hanging a pendulum at the dome of the Panthéon in Paris in 1851. The pendulum is released without any further disturbance that natural gravity when burning rope. The initial velocity is null relative to the Earth, but the pendulum does not return in the same plane but slightly offset demonstrating the rotation of the Earth relative to celestial stars. After one hour the public, numerous for this event, could see that the plane of oscillation was shifted 11°. "The image is slightly reworked compared to the original using Gimp to extract the detail of the launch and enhance colors, contrast and white balance."