MARAT. Recherches physiques sur le Feu. 1780. Source de discorde avec Lavoisier

One of the best known of the scientific books by the infamous French revolutionary Marat. In the Recherches physiques sur le Feu", he sets forth his theory of "fluide ignée", a mechanical explanation of the phenomenon of heat, based on 166 experiments in two of which he demonstrates an increase in weight of metals after calcination (pp. 29-31).
Fine copy.