Abstract
We study here the reception by their contemporaries of Antoine de Villon's and étienne de Clave's anti-Aristotelian, almost materialistic and atomistic theses, which they intended to support publicly in Paris in 1624, using chemical experiments to this purpose. After surveying the intellectual context which could have then nourished an atomism based upon chemical experiments, we go on to show how these theses, far from having been perceived as prominently atomistic, were condemned by the contemporaries above all because of the theological implications of their provocative anti-Aristotelism. Alchemy itself was not directly implicated in the case of the theses. On the contrary, the theses were perceived as an alien body within the alchemical tradition