(Born: Stavelot, Belgium, 2 December 1826; Died: Liège, Belgium, November 1905) Belgian physician, mineralogist & geologist.

From 1850, Dewalque was a professor of physics and chemistry at the University of Liège. In 1855, he was appointed as the conservator of the mineral cabinet. In 1857 he became professor extraordinary and in 1865 professor ordinary in mineralogy and geology at Liège University. He authored over 400 publications on different facets of Belgian geology. In 1870 Dewalque was elected the president of the Belgium Academy of Science.

Biographical references: ABF: II 216, 257. • BAB: 186, 139-213. • Bollettino della Società Geologica Italiana Roma: 25 (1906), p. xlv-xlvi. • Firket, Adolphe, "Manifestation en l'honneur de M. Dewalque", Annales de la Société Géologique de Belge, 10 (1883), p. cxcix-ccvii. • Geological Magazine: 43 (1906), no. 1, 48. • Lohest, Max, "Notice sur Gustave Dewalque", Annales de la Société Géologique de Belge, 38 (1911), p. B77-B158, portrait. Reprinted in Académie royale des sciences, des lettres et des beaux-arts de Belgique, 77 (1911), 53-103, portrait. • Poggendorff: 3, 357, 4, 324-5 & 5, 287. • Proceedings of the Geological Society, London: 1905-1906, lvi-lvii. • Sarjeant, Geologists, 1980: 2, 897. • Soreil, Gustave J., "Manifestation en l'honneur de M.G. Dewalque", Annales de la Société Géologique de Belge, 26 (1899), p. cxxii-cxxviii, frontispiece (portrait). • WBI.

1. French, 1862 [Dissertation].
Atlas de Crystallographie. Paris, 1862.

8°: 16 p., 18 plates (numbered I-XVIII). Description du Lias de la Province de Luxembourg. Inaugural Dissertation. Rare.

Bibliographical references: NUC.

Catalogue, 1884

2. French, 1884 [Bibliography].
Societé Géologique De Belgique | [rule] | Catalogue | Des Ouvrages De | Géologie, De Minéralogie | Et De | Paléontologie | Ainsi Que Des | Cartes Géologiques | qui se trouvent dans les principales bibliothèques de Belgique | Par G. Dewalque | Secrétaire Général | [ornament] | Liège | Imprimerie H. Vaillant-Carmanne, | Rue Saint-Adalbert, 8. | [short rule] | 1884.

8°: [i]-xii, [2], [1]-394 p.

Contents: [i-ii], Half title page, verso blank.; [iii-iv], Title page, verso blank.; [v]-xii, "Avertissement."; [1 pg], Liste Des Abréviations."; [1 pg], Blank.; [1]-394, Text.

Very scarce. This important 19th century catalog of geology, mineralogy and palaeontology books lists over 3,300 items relative to the geology of Belgium and adjacent areas in France. There is included an extensive alphabetical index.

Bibliographical references: BL [11903.aa.16.]. • Margerie, Bibliographies Géologiques, 1896: no. 1061. • NUC: ??, ??.

.