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"LECOQ de BOISBAUDRAN, PAUL ÈMILE. - THE DISCOVERY OF SAMARIUM.
Reference : 47275
(1879)
Nouvelles raies spectrales observées dans des substances extraites de la samarskite.
(Paris, Gauthier-Villars), 1879. 4to. No wrappers. In: ""Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences"", Tome 88, No 7. Pp. (313-) 352. (Entire issue offered). Boisbaudran's paper: pp. 322-324.
First apperance of the paper in which Boisbaudran revealed his discovery of a new earth that precipitated had a unique spectrum. De Boisbaudran named it samaria, after the mineral from which it was derived. The mineral samarskite is named for a Russian mining engineer and Chief of Staff - Corps of Mining Engineers, Colonel Vasili Evgrafovich Samarsky-Bykhovets.""Samarium was discovered by French chemist Paul Émile Lecoq de Boisbaudran in 1879. He noticed in his research that impure didymium (praseodymium and neodymium with other impurities), seemed to contain more than just didymium based on spectroscopic work on various rare-earth minerals. When Lecoq de Boisbaudran added ammonium hydroxide to a concentrate prepared from the mineral samarskite he observed a precipitate that formed before the didymium (Weeks and Leicester, 1968, p. 685). Partington ""Breakthroughs"" 1879 C.
Sur un nouveau Métal, le Gallium.
Paris, G. Masson, 1877. 8vo. Contemp. hcalf, raised bands, gilt spine. Light wear along edges. Small stamps on verso of titlepage. In: ""Annales de Chimie et de Physique"", 5e Series - Tome 10. 576 pp. a. 2 folded engraved plates. (The entire volume offered). Lecoq de Boisbaudran's paper: pp. 100-141 a. 1 handcoloured engraved plate (showing the two spectral lines of gallium).
First appearance of a milestone paper in chemistry and physics in which the author describes how he found the new element Gallium by analyzing spectral lines which he observed on a Pyrenea blende sample, the emission lines corresponding to the eka-aluminum that was predicted by Mendeleev in 1871 and he subsequently isolated the element by electrolysis. This was the first element discovered by use of the spark spectrum. In his discovery of the new element Boisbaudran was not guided by the predictions of Mendeleev, but only by his own law of spectra.""Boisbaudran ranks with Bunsen, Kirchhoff, and Crookes as one of the founders of the science of spectroscopy.""(Weeks).""Lecoq de Boisbaudran announced his discovery (by spectroscopic analysis) of the new element gallium. Mendeleev had first predicted its existence and had named it eka-aluminium. The discovery was made in the author's private laboratory, in a specimen of zinc blende from the Pierrefitte mine in the Angelès Valley in the Hautes Pyrénées. He describes how on the evening of 27 August 1875 he detected the existence of this new element, which he named ""gallium"" in honor of France (Gallia). The plate shows the two spectral lines of gallium, which are distinct from those of other elements (indium and potassium) in the same region of the spectrum. A month later he ""performed in Wurtz's laboratory in Paris....a series of experiments to prove that gallium...is a true element""(Weeks). he discusses how he eventually isloated small amounts of pure metallic gallium and determined its physical and chemical properties. The paper (the paper offered) first describes gallium compounds (e.g., ammonium gallium alum,, chloride, oxide, and sulphate).""(Roy G. Neville II, p. 29).Partington IV,897. - Weeks p. 215 ff.The volume contains other nptable papers EDMUND BECQUEREL ""Sur l'Observation de la partie infra-rouge du spectre solaire, au moyen des effets de phosphorescence"", pp. 5-12, 8 papers by MARCELLIN BERTHELOT.
"LECOQ de BOISBAUDRAN, PAUL ÈMILE. - ANNOUNCING THE DISCOVERY OF THE ELEMENT GALLIUM.
Reference : 47271
(1875)
Caractéres chimique et spectroscopiques d'un nouveau métal, le Gallium, découvert dans une blende de la mine de Pierrefitte, vallée d'Argelès (Pyrénées). (Séance du Lundi 20 Septembre 1875). (+) Sur quelques propriétés dy gallium. (Séance du Lundi 6...
(Paris, Gauthier-Villars), 1875. 4to. No wrappers. In: ""Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences"", Tome 81, No 12 and No 23. Pp. (485-) 508 a. (1065-) 1148. (2 entire issues offered). Boisbaudran's papers: pp. 493-495 a. pp. 1100-1105.
First printing of the paper in which Boisbaudran announced his discovery of Gallium, together with the first printing of the paper in which he, by a series of experiments proved that Gallium, the metal that he had discovered amd named in honour of France, is a true element. A larger paper on the discovery was published in 1877 in ""Annales de Chimie et Physique"". In 1879 Bausbaudran was awarded the Davy Medal for his discovery of Gallium. ""In 1875 Boisbaudran spectroscopically discovered a new element, gallium, which he found in zinc blende from a mine in Hautes-Pyrénées. Continuing his work in Wurtz’s laboratory in Paris, he was a able to obtain the free metal by electrolysis of a solution of the hydroxide in potassium hydroxide. Gallium, Boisbaudran realized, was the ""eka-aluminum"" predicted by Mendeleev, and was the first of Mendeleev’s predicted elements to be isolated. Boisbaudran’s finding thus provided valuable evidence for the validity of Mendeleev’s periodic classification of the elements.""(DSB).""Lecoq de Boisbaudran announced his discovery (by spectroscopic analysis) of the new element gallium. Mendeleev had first predicted its existence and had named it eka-aluminium. The discovery was made in the author's private laboratory, in a specimen of zinc blende from the Pierrefitte mine in the Angelès Valley in the Hautes Pyrénées. He describes how on the evening of 27 August 1875 he detected the existence of this new element, which he named ""gallium"" in honor of France (Gallia)... A month later he ""performed in Wurtz's laboratory in Paris....a series of experiments to prove that gallium...is a true element""(Weeks). he discusses how he eventually isloated small amounts of pure metallic gallium and determined its physical and chemical properties. The paper (the paper offered) first describes gallium compounds (e.g., ammonium gallium alum,, chloride, oxide, and sulphate).""(Roy G. Neville II, p. 29).
Spectres lumineux. Spectres prismatiques et en longueurs d'ondes destinés aux recherches de chimie minérale
Paris, Gauthier-Villars, 1874, in-8, 2 volumes, soit un volume de texte de VI-207 pages ; et un atlas de VI pages et 29 planches montées sur onglets, gravées sur métal par Dulos, dont 1 à double page, sous serpentes, demi-chagrin bleu foncé, dos à faux nerfs et filetés, Première édition, rare, de cet ouvrage donnant le résultat d'expériences effectuées sur trente-cinq éléments, observés dans le spectroscope à un seul prisme et à vision horizontale. Lecoq s'est attaché à reproduire, pour ses planches représentant les mesures des spectres lumineux, tout ce qu'il voyait, se démarquant ainsi des auteurs précédents qui ne représentaient les raies que par de simples traits. On doit à Lecoq de Boisbaudran (1838-1912) d'importants travaux en spectroscopie, en physique moléculaire et en électro-chimie ; on lui doit aussi la découverte du gallium. Cachets annulés de l'Institut catholique au revers du titre et des planches ; étiquettes en pied des dos. Bon exemplaire. Quelques rousseurs aux serpentes et à la planche double ; planche XII détachée. DSB II, 254 ; Bolton 608 ; Poggendorff III, 788. Couverture rigide
Bon 2 volumes, soit un volume de
"LECOQ de BOISBAUDRAN, PAUL ÈMILE. - RARE EARTH DISCOVERY - HOLMIUM AND DYSPROSIUM.
Reference : 48205
(1886)
L'holmine (ou terre X de M. Soret) contient au moins deux radicaux métalliques. (+) Sur le dysprosium. (2 Papers).
(Paris, Gauthier-Villars), 1886. 4to. No wrappers. In: ""Comptes Rendus hebdomadaires des Séances de L'Academie des Sciences"", Tome 102, No 18. Pp. (991-) 1041. (Entire issue offered). The papers: pp. 1003-1004 a. 1005-1006.
First apperance of the papers in which Lecoc de Boisbaudran described how he separated Holmium into two kinds of earths and naming them.""He accomplished this by fractional prepicitation, first with ammonium hydroxide and then with a saturated solution of potassium sulfate, and found that the constituents of pure holmium solutions precipitate in the folloeing order: terbium, dysprosium, holmium, and erbium. Lecog de Boisbaudran never had an abundant supply of raw materials for his remarkable researches on the rare earths, and he once confided to professor Urbain that most of his fractionations had been carried on on the marble slab of his fireplace.""(Weeks ""Discovery of the Eelements"").Parkinson ""Breakthroughs"", 1886 C.
