‎GERHARDT (C.)‎
‎Précis de chimie organique -- EDITION ORIGINALE -- 2 VOLUMES (COMPLETE SET)‎

‎P., Fortin, 1844/1845, 2 VOLUMES in 8 reliés en demi-basane marron, dos ornés de filets dorés (reliures de l'époque), (cachets de bibliothèque, mouillures à la partie inférieure des premiers feuillets au tome 1 et dans la marge supérieure de quelques feuillets au tome 2, un coin légèrement émoussé), T.1 : 16pp., 635pp., T.2 : (2), 592pp.‎

Reference : 23390

‎---- EDITION ORIGINALE ---- EXEMPLAIRE BIEN COMPLET DE SES DEUX VOLUMES ---- "GERHARDT will occupy a permanent position in the history of chemistry for his services to organic classification, for his concept of homology, for his preparation of acid anhydrides and for his reform of equivalents... A considerable part of GERHARDT's claim to our attention is connected with his use of certain formulas in chemistry. Like LAVOISIER, he felt that chemistry could be successfully pursued only if it were based on a rational and systematic language. It was not merely that formulas are a reflection of our basic concepts but, more, that "our formulas are our ideas"... GERHARDT was one of the first to make systematic use of equations in chemistry... He generalized the concept of homologous series and introduced it into his Précis de chimie organique". (DSB V pp. 369/374) ---- Partington IV pp. 405/431 ---- Théories - Classification - Equivalents - Nomenclature - Caractères des composés organiques (sels, alcaloïdes, alcools, éthers, hydrocarbures, huiles essentielles, résines, matières colorantes...) - Métamorphoses par les réactifs (agents ou réactifs en général, chaleur, oxygène, air, soufre, chlore, iode, brome, potassium et sodium, potasse et sude, ammoniaque, chaux et baryte...) - Histoire et classification**23390/2339/o6de‎