‎BERGMAN (T.)‎
‎Traité des affinités chymiques ou attractions électives. Traduit du latin sur la dernière édition et augmenté d'un suppélment et de notes -- PREMIERE EDITION FRANCAISE AUGMENTEE DE NOTES INEDITES DE BERTHOLLET -- BEL EXEMPLAIRE BIEN COMPLET DE SES TROIS TABLEAUX DEPLIANTS ET DE SES 4 PLANCHES DEPLIANTES‎

‎P., Buisson, 1788, un volume in 8 relié en pleine basane, dos orné de fers dorés, tranches rouges (reliure de l'époque), (4), 444pp., (1), 3 TABLEAUX DEPLIANTS, 4 PLANCHES DEPLIANTES‎

Reference : 375

‎---- PREMIERE EDITION FRANCAISE traduite du latin par F.J. Bonjour, assistant de Berthollet et AUGMENTEE DE NOTES INEDITES DE BERTHOLLET. CES NOTES OCCUPENT LES PAGES 260 A 444 ---- BEL EXEMPLAIRE ---- "His belief in attraction between molecules and the vast knowledge of chemical reactions acquired in the course of his analytical work put Bergman in a good position to study chemical affinity... Eighteenth-century chemists sometimes thought that the affinity between two substances was a variable quantity, for the course of many reactions could be altered, particularly by the action of heat. A. Baumé pointed this out in 1763 and suggested that two affinity tables should be drawn up, one for reactions "in the wet way" and the other for reactions "in the dry way". Bergman was the first to do this, but he did not accept the view that affinities were variable. He stated emphatically that reactions in aqueous solution showed the true affinities of substances and that changes in the order of affinities in the dry way were due to the action of heat. His tables contain fifty-nine columns representing reactions in the wet way and forty-three in the dry way. These tables were widely praised and were reprinted as late as 1808 in Nicholson's Dictionary of chemistry... In his theoretical discussion Bergman advanced a simplified version of P.J. Macquer's classification to the types of attraction... Affinity tables showed single elective attractions and Bergman considered that from these it should be possible to find the results of reactions involving several substances, for double elective attractions were to be calculated from the algebraic sums of single attractions... Soon after the publication of his work this was done by Kirwan, Guyton and others...". (DSB II) -- Cole N° 98 - Partington III pp. 179/199**375(7951).ARM2A‎