phlogiston The elementary principle postulated by Georg Stahl to be lost from substances when they burn. The phlogiston concept provided 18-th century chemistry with its unifying principle. The phlogiston theory of combustion found general acceptance until displaced by its inverse – Lavoisier's oxygen theory. Related category HISTORY OF SCIENCE Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |