COTTE (Louis) Traité de météorologie, Paris: Imprimerie royale, 1774. - In-4, marbled basane, ornate spine, blue speckled edges (period binding). First edition of this important scientific treatise by Oratorian priest and meteorologist Louis Cotte (1740-1815). Dedicated to members of the Académie des Sciences, it consists of 6 parts: Histoire des observations météorologiques. - Treatise on meteors. - History and description of the barometer, thermometer and other meteorological instruments. - Tables of meteorological and batanic-meteorological observations. - Results of tables and observations. - Method for making meteorological observations. The edition is illustrated with 14 plates showing thermometers, barometers, hygrometers, anemometers, compasses and electrometers. Some spotting, missing at head cover, top of first cover and corners. Very good condition inside.