680 SIGAUD DE LA FOND (Jean-René). Essai sur différentes espèces d'air-fixe ou de gas, pour servir de suite et de supplément aux Eléments de physique du même auteur. Paris, Gueffier, 1785, in-8, XVIII-499 pp. ; [1] p., basane racinée, triple gilded fillets framing the boards, smooth spine decorated (period binding). Illustrated with 8 folding plates. New edition revised and enlarged by Rouland. A pupil of Abbé Nollet, Sigaud de la Fond carried out numerous experiments, including several with Macquer, the most famous being that of water synthesis: the combustion of hydrogen and air to produce water. Slight damage to second plate.