This is a vintage black and white illustration depicting a scientific experiment involving a rooster. The rooster is lying on a large, oval-shaped table, seemingly unconscious or in a state of paralysis. The table has a textured surface and is supported by a pedestal base. Behind the table is a window with a view of a garden or courtyard. The window is framed by a textured wall. A plant is visible through the window, adding a touch of nature to the scene. The overall style of the illustration is reminiscent of 19th-century scientific diagrams, with detailed linework and a focus on anatomical accuracy. The caption at the bottom reads 'Fig. 7. - Experiment of the catalytic cock.'