Esprit de bière (Beer) is a kind of attempt on an archaeological liquid, mixing the skills of playing truant and the quest for oneself. It makes its own investigation around this gol den drink as a police officer would do around some trivial event. Beer is first analysed as a substanc e, as a matter (real, chemical, physical,...). Then its own cycle will be careful ly studied. The Cycles reach every men in their wishs to create links and exchanges. The Cycles remind us that even beer can be a matter to think about.