Neuchatel, Samuel Fauche, 1783. 4to. Bound in fine contemp. full sprinckled calf, raised bands and richly gilt spine. Wear to head of spine. Without the 2 free endpapers. Halftitle present and with stamps. XXIV,367 pp., 2 engraved plates (1 folded). The folded plate depicts his two types of Hair-Hygrometers a. 1 engraved vignette. A fine clean and wide-margined copy.
Reference : 44413
First edition of a fundamental work in Meteorology in which Saussure describes how to construct a hygrometer from human hair that can measure the relative humidity, and discussing the principles behind it. Cuvier regarded this book as one of the greatest contributions to science of the eighteenth century.""A milestone work in chemistry, physics, and meteorology, which established hygrometry as an exact science. Primarely a geologist who explored and published on the Alps, Saussure (1740-1788) was the first to prove that air expands and becomes less dense the more humidity it contains. In these Essais (the work offered) he describes his experiments with the hair hygrometer of his invention and his theory of the evaporation and hygrometry with their applications to meteorology. he also enunciates his theory of the evaporation of water in hydrogen, carbon dioxide, and other gases.""(Neville II, p. 427 a).""In his essay on the theoretical principles of hygrometry (which he conceives as ""the art of measuring the absolute quantity of water suspended in the air""), De Saussure distinguishes three classes of methods of determining humidity, which respectively utilize (i) observations of changes in the weight, dimensions, or shape, of a hygroscopic body" (ii) observations of the capacity of the air for taking up water" and (iii) observations of the quantity of water condensing from the air under given conditions on a cold surface, or of the degree of cold necessary to start such an condensation...""(Wolf ""A History of Science , Technology, & Philosophy in the 18th Century"" I, p. 326 ff.).Partington III, 763. - Partington ""Breakthroughs"" 1783 M - Poggendorff II, 755-56.
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1) Neuchâtel, Samuel Fauche, père et fils M. DCC. LXXXIII. / 2) Genève, Barde, Manget, et se trouve à Paris, chez Buisson, M. DCC. LXXXVIII., 1783 -1788, fort in-8°, 2) XII (faux-titre, titre avec vignette, préface) + 524 p., illustré d'une vignette gravée (en-tête du premier essai) + 2 planches gravées dépliantes (dont une montre l'appareil) et 11 tables. / 2) 1 f. (faux-titre) + 82 p. (recte: 84) + 1 planche gravée, timbre ‘Bibliothèque d'Alfred ..... (rature)’ sur faux-titre, brochure d'attente, papier non rogné, dos dénudé et fendillé.
Edition in-8°, publiée la même année que l'édition originale au format in-4°. Oeuvre fondatrice dans l'histoire des sciences et de la météorologie, par le fameux auteur des «Voyages dans les Alpes», un des plus grands savants suisses du XVIIIe siècle. Première édition du supplément publié 5 ans plus tard, et qu'on ne trouve que très rarement.“Saussure, the Alpine explorer, founded hygrometry, the branch of physics that deals with the measurement of the humidity of air and gases. He invented the air hygrometer - the only type of absorption hygrometer widely used in meteorology - and he was the first to prove that air expands and decreases in specific weight as its moisture content increases. This work describes Saussure's pioneering experiments with his new instrument as well as its application to meteorology. By tradition the quarto edition has been considered the first” (Norman). Poggendorff II/755; Waller 11432; Norman library 1894; DHBS V/730; Dictionary of Scientific Biography XII/119; Sparrow, Milestones in science N° 174. Image disp.
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Neuchâtel, Samuel Fauche père et fils, 1783. Fort in-4° , veau raciné, dos à nerfs orné, tranches rouges. XXIV + 367 pp., très jolie vignette gravée (en-tête du premier essai) et deux planches gravées dépliantes (dont une montre l'appareil).
Edition originale d'une oeuvre fondatrice dans l'histoire des sciences et de la météorologie, par le fameux auteur du Voyages dans les Alpes, un des plus grands savants suisses du XVIIIe siècle. Joli exemplaire, bien conservé.