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Essay on the Theory of the Earth with Mineralogical Notes Essay on the Theory of the Earth with Mineralogical Notes

SAUSSURE, HORACE-BENEDICT DE - ONE OF THE GREATEST SCIENTIFIC WORKS OF THE EIGHTEENTH CENTURY (CUVIER)Biblio.com

Essais sur L'Hygrometrie. I-IV. I. Description d'un nouvel Hygrometre comparable. II. Théorie de l'hygrométrie. III. Théorie de l'évaporation. IV. Application des théories précédentes à quelques phénomenes de la météorologie.

178344413Neuchatel 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. XXIV367 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. <br/><br/><em>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. </em> hardcover

Herman H. J. Lynge & Søn A/S · Danemark8 500,00 DKK≈ 1 141,55 €

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