This is the 9th artist's publication in conjunction with the yearly summer exhibition in the area of the Mauvoisin Dam in Vallais, Switzerland, curated by Jean-Paul Felley. The periodic table of chemical elements is one of science's most important achievements. It is a unique conceptual tool for predicting the appearance and properties of matter on Earth and in the rest of the Universe. On the occasion of his exhibition around the Fionnay compensation basin, Allouche presents a set of 96 color photographs obtained by spectroscopy and associating the names of the chemical elements with the light they emit.