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DUMAS, JEAN BAPTISTE-ANDRE & J.S. STAS. - THE MAIN PAPER ON SUBSTITUTION AND THE THEORY OF TYPES.
Reference : 45032
(1840)
Premier Mémoire sur les Types Chimiques Par M. J. Dumas. (+) Second Mémoire sur les Types Chimiques" par MM. J. Dumas et J.-S. Stas.
(Paris, Fortin, Masson et Cie, 1840). 8vo. Without wrappers. Extracted from 'Annales de Chimie et de Physique', 2e Series, tome 73. Pp. 73-103 (incl. Note de Liebig pp. 100-103) and pp. 113-166. Some scattered brownspots.
This paper, which was published at the same year in ""Comptes Rendues"" (3 Fevrier), is the most importent on the theory of structural types and the nomenclature of organic compounds, refuting the electrochemical theory of Berzelius. ""The development of this idea (type organique) into what is sometimes called the ""Older Type Theory"", as distinguished from Gerhardt's Type heory, is contained in Dumas' importent memoir on the substitution and the theory of types, presented on 3 febriary 1840.""(Partington IV, p. 365). In the second paper Stas and Dumas record the first use of 'potash-lime', the precursor of soda-lime, an invaluable reagent in organic chemistry.""Jean Baptiste Dumas advances a theory that the chemical properties of an organic compound are determined by its structure and not, as seems to be the case with inorganic compounds, by its electrical properties. he illustrates the concept with the example that the basic qualitative properties of acetic acid are retained even after replacing three fourths of the hydrogen by chlorine. As a consequence, he calls for a revision of chemical nomenclature for organic compounds, basing terms on common features, not on elemental composition.""(Parkinson ""Breakthroughs"" 1840 C).
Premier Mémoire sur les Types Chimiques Par M. J. Dumas. (+) Second Mémoire sur les Types Chimiques" par MM. J. Dumas et J.-S. Stas. - [THE MAIN PAPER ON SUBSTITUTION AND THE THEORY OF TYPES.]
Paris, Fortin, Masson et Cie, 1840. 8vo. In contemporary half calf with gilt lettering spine and five raised bands. The original wrappers withbound in the back. In ""Annales de Chimie et de Physique"", tome 73. Entire volume offered. Paper label pasted on to top of spine. Two stamps to verso of title-page. A few light occassional brownspots, otherwise a fine copy. 73-103 (incl. Note de Liebig pp. 100-103) and pp. 113-166. [Entire volume: 448 pp. + 5 folded plates.
This paper, which was published at the same year in ""Comptes Rendues"" (3 Fevrier), is the most importent on the theory of structural types and the nomenclature of organic compounds, refuting the electrochemical theory of Berzelius. ""The development of this idea (type organique) into what is sometimes called the ""Older Type Theory"", as distinguished from Gerhardt's Type heory, is contained in Dumas' importent memoir on the substitution and the theory of types, presented on 3 febriary 1840.""(Partington IV, p. 365). In the second paper Stas and Dumas record the first use of 'potash-lime', the precursor of soda-lime, an invaluable reagent in organic chemistry. ""Jean Baptiste Dumas advances a theory that the chemical properties of an organic compound are determined by its structure and not, as seems to be the case with inorganic compounds, by its electrical properties. he illustrates the concept with the example that the basic qualitative properties of acetic acid are retained even after replacing three fourths of the hydrogen by chlorine. As a consequence, he calls for a revision of chemical nomenclature for organic compounds, basing terms on common features, not on elemental composition.""(Parkinson ""Breakthroughs"" 1840 C).
"DUMAS, JEAN BAPTISTE-ANDRE & J.S. STAS. - THE ATOMIC WEIGHT OF CARBON ESTABLISHED.
Reference : 44902
(1841)
Recherches sur la véritable poids atomiques du carbone. (Lu à l'Academie des Sciences, le 21 décembre 1840).
Paris, Fortin, Masson et Cie, 1841. 8vo. Contemp. hcalf, raised bands, gilt spine. Light wear along edges. Small stamps on verso of titlepage. In: ""Annales de Chimie et de Physique"", 3e Series - Tome 1. 512 pp. a. 3 folded engraved plates (showing experimental apparatus).Small stamp to verso of plates. (The entire volume offered). Dumas & Stas' paper: pp. 1-59. Clean and fine.
First appearance in full of this paper, stating the correct weight of the carbon atom, which had profound influence on the development of organic chemistry. The first announcement (in extrait) came out in Comptes rendus, Tome Xi, 1840.""From 1840 onward he carried out an important revision of the atomic weights of thirty elements. His most valuable contribution in this field was his very precise determination of the atomic weight of carbon (jointly with his pupil Stas) in 1840.2 A previously accepted weight, determined by Berzelius as C = 12.20 (O = 16), was shown to be incorrect. Dumas proved that C = 12±.002 (O = 16) or C = 75 (O = 100). The analysis was made by burning diamond and artificial and natural graphite in oxygen"" the carbon dioxide formed was weighed in potash solution. The results were in close agreement. The ""new"" weight of carbon had a great effect on the progress of organic chemistry.""(DSB).The volume contains further notable papers by Gerhardt et Cahours ""Recherches chimiques sur les huiles essentitielles"", pp. 60-110, by Laurent, Boussingault, Regnault, Dulong, Melloni et al.
"DUMAS, JEAN BAPTISTE & ANDRE & J.S. STAS. - THE ATOMIC WEIGHT OF CARBON ESTABLISHED.
Reference : 47238
(1840)
Recherches sur la véritable poids atomiques du carbone.(Extrait).
(Paris, Bachelier), 1840. 4to. No wrappers. In: ""Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences"", Tome XI , No 25. Pp. (991-) 1020. (Entire issue offered). The paper: pp. (991-) 1008. A bit of marginal soiling and some creasing to leaves.
First appearance of the paper which states the correct weight of the carbon atom. This research had profound influence on the development of organic chemistry. The paper in full was published the year after (1841) in ""Annales de Chimie et de Physique"".""From 1840 onward he carried out an important revision of the atomic weights of thirty elements. His most valuable contribution in this field was his very precise determination of the atomic weight of carbon (jointly with his pupil Stas) in 1840. A previously accepted weight, determined by Berzelius as C = 12.20 (O = 16), was shown to be incorrect. Dumas proved that C = 12±.002 (O = 16) or C = 75 (O = 100). The analysis was made by burning diamond and artificial and natural graphite in oxygen"" the carbon dioxide formed was weighed in potash solution. The results were in close agreement. The ""new"" weight of carbon had a great effect on the progress of organic chemistry.""(DSB).
