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Gabriel Delafosse
DELAFOSSE, Gabriel.

DELAFOSSE, Gabriel.
(1796 - 1878)

(Born: San Quentin, France, 24 February 1796; Died: Paris, France, 13 October 1878) French mineralogist, geologist & chemist.

However, Gabriel Delafosse (1796-1878) , not stopping with the only numerical data, considers that their chemical composition should be studied. It thus defines the difference between the "integral molecule" (molecule) and the "chemical molecule" (atom) of the crystals. By seeking the provision of the atoms inside the physical molecule, Delafosse is one of the first, in mineralogy, to apply the atomic theory. From this study on the chemical composition of minerals result from many work on the conditions of crystallization. Thus isomorphism and polymorphism with Eilhardt Mitscherlich (1794-1863) will be discovered , then will appear the concepts of dimorphism, homeomorphism, etc.

Biographical references: ABF: I 292, 21-26. L'Année Scientifique et Industrielle: 22 (1878), 494 [by L. Figuier]. Barr, Index to Biographical Fragments, 1973: 66. DBF: 10, 632-3. DSB: 15, 114-5 [by K.L. Taylor]. Fruton, Bio-Bibliography, 1982: 158 [other refs.]. Glaeser, E., Biographie nationale des contemporains. Paris, 1878. 4,824 p. [French national biography of the 19th century.]. Poggendorff: 1, cols. 538-9 & 3, 344. Revue Scientifique: Series 2, 8 (1878), 481-4 [by C. Friedel]. Sarjeant, Geologists, 1980: 2, 881 & Suppl. 2 (1995), 1, 571. WBI. World Who's Who in Science: 435.

1. French, 1833 [2nd edition].
Précis | Élémentaire | D'Histoire Naturelle, | Par G. Delafosse, | [...one line of titles and memberships...] | L'Usage Adopté Par Le Conseil Royal De L'Instruction Publique | Pour Les Colléges Et Les Écoles Normales Primaires. | Première Partie: | Minéralogie Et Géologie. | [rule] | Deuxième Édition. | [rule] | Paris, | Librairie Classique Et Élémentaire | De L. Hachette, | Rue Pierre-Sarrazin, No 12. | [tapered rule] | 1833.

2 vols.

Very scarce. Contents pt. 1. Minéralogie et géologie - pt. 2. Botanique. Zoologie.

4th edition, 1841: Précis Elémentaire d'Histoire Naturelle. Paris, Hachette , 1841. xii, 646 p., 46 plates.

5th edition, 1855: Précis Elémentaire d´Histoire Naturelle. Paris, P.L. Hachette et Cie., 1855. xxviii, 687 p., 46 plates.

8th edition, 1858: Précis Elémentaire d´Histoire Naturelle. Paris, 1858. 687 p.

9th edition, 1863: Précis Elémentaire d´Histoire Naturelle. Paris, 1863. 691 p., 46 plates.

Nouveau Cours de Minéralogie, 1858

2. French, 1858-62.
Nouveau Cours | De | Minéralogie | Comprenant La | Description De Toutes Les Espèces Minérales | Avec Leurs Applications Directes Aux Arts, | Par M. Delafosse, | [...5 lines of titles and memberships...] | Tome Premier. [-Troisime]. | [ornate rule] | Paris | A La Librairie Encyclopédique De Roret, | Rue Hautefeuille, 12. | 1858 [-1862].

[Title page of atlas reads:]

Cours | De | Minéralogie | Par M. Delafosse. | [rule] | Explication Des Planches. | [ornate rule] | Atlas | [ornate rule] | Paris | A La Librairie Encyclopédique De Roret, | Rue Hautefeuille, 12.

3 vols. and atlas. [Vol 1: 1858] 8°: π2 1-348 351; 275l.; [4], [1]-546 p.; [Vol 2: 1860] 8°: π2 1-308 314; 246l.; [4], [1]-486, [2] p.; [Vol 3: 1862] 8°: π2 1-398 402; 316l.; [4], [1]-628 p.; [Atlas] 8°: [1]-24 p., 40 folding plates (showing crystal diagrams). Page size: Text, 214 x 134 mm.; Atlas, 212 x 152 mm.

Contents: [Vol 1] [2 pgs], Half title page, "Nouveau Cours | De | Minéralogie. | [rule] | Tome I.," verso blank.; [2 pgs], Title page, verso blank.; [1]-526, Text.; [527]-540, "Appendice | Au Premier Volume."; [541]-546, "Table Des Matières | Du Premier Volume."

[Vol 2] [2 pgs], Half title page, "Nouveau Cours | De | Minéralogie. | [rule] | Tome II.," verso blank.; [2 pgs], Title page, verso blank.; [1]-482, Text.; [483]-486, "Table Des Matières | Du Scond Volume."; [1 pg], "Errata | Pour Le Premier Volume."; [1 pg], Blank.

[Vol 3] [2 pgs], Half title page, "Nouveau Cours | De | Minéralogie. | [rule] | Tome II.," verso blank.; [2 pgs], Title page, verso blank.; [1]-607, Text.; [608]-613, "Table Des Matières | Du Troisième Volume."; [614], "Errata."; [615]-628, "Index | ou | Table Générale Des Espèces | Décrites Dans Les Deux Derniers Volumes."

[Atlas] [1-2], Half title page, "Cours | De | Minéralogie. | [rule] | Atlas. | [rule]," verso blank.; [3-4], Title page, verso blank.; [5]-24, "Explication Des Planches."; [At end], 40 folding plates.

Very scarce. In The New Course of Mineralogy, Delafosse concentrates his text on the practical use of minerals in industry.

Bibliographical references: NUC.

3. French, 1867.
En France | [ornate rule] | Rapport | Sur | Les Progres De La Minéralogie | Par G. Delafosse | [...3 lines of titles and memberships...] | Publication Faite Sous Les Auspices | Du Ministere De L'Instruction Publique | [ornament] | Puris | Imprimé Par Autorisation De S. Ex. Le Garde Des Sceaux | A L'Imprimerie Impériale | [rule] | M DCCC LXVII.

8°: [4], [1]-97, [1] p.

Contents: [2 pgs], Half title page, verso blank.; [2 pgs], Title page, verso blank.; [1]-97, Text.; [1 pg], Blank.

Very scarce. Published as: Recueil de rapports sur les progres des lettres et des sciences en France, this work reports on the progress of mineralogy in France as a science over the course of 20 years. Sections include systems of crystallography, physical and chemical mineralogy, and classificaiton systems of mineralogy. Delafosse abundantly quotes the work of Pasteur, his pupil.

Bibliographical references: NUC.

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