Mercury, wood, steel and spotlight.
The work is a circular sculpture with a diameter of 3 metres. Mercury is poured onto the support, covering its surface with a sheet of metal, whose thickness is the result of the cohesion of the mercury. Once poured, the metal acts as a skin sensitive to the vibrations of ground and air. By means of a spotlight, they are projected onto the wall and made visible in the ellipse of light that forms on the wall. The piece was installed on 9 May 1983 at the Valdecilla Foundation in Madrid using 480 Kg of mercury donated for the occasion by the mines of Almaden and Arrayanes.