1929 deaths

Charles Edmond Alfred Riquier (19 November 1853, Amiens – 17 January 1929, Caen) was a French mathematician.Riquier matriculated in 1873 at the École Normale Supérieure (ENS) where he received his agrégé in mathematics in 1876. He taught from 1876 to 1878 at the Lycée de Brest and then from 1878 to 1886 at the Lycée de Caen and from 1886 to 1924 at the Université de Caen, where he retired as a professor emeritus.
After a brief leave of absence from the Lycée de Caen, Riquier received his doctorate in mathematics in 1886 from ENS at Paris with dissertation Extension à l’hyperespace de la méthode de M. Carl Neumann pour la résolution de problèmes relatifs aux fonctions de variables réelles à laplacien nul. His thesis committee consisted of Hermite (as chair), Darboux, and Picard.In 1910 he was awarded the Poncelet Prize. In 1920 he was elected to the French Academy of Sciences as the successor to Hieronymus Zeuthen. (Eugène Fabry was elected Riquier's successor in 1931.)
Riquier, Maurice Janet, Joseph Miller Thomas, Joseph Fels Ritt, and Ellis Kolchin were among the greatest pioneers of differential algebra and symbolic computation for systems of partial differential equations.

Aldo Perroncito (18 May 1882, Turin – 1929) was an Italian pathologist. He was the son of parasitologist Edoardo Perroncito (1847–1936). He is known for research involving regeneration of peripheral nerves, kinetic behavior of the Golgi apparatus during mitosis, and studies of pellagra.
In 1905 he obtained his medical doctorate from the University of Pavia, where he spent the following five years as an assistant to pathologist Camillo Golgi (1846–1926). During this time period he also conducted studies at the Institute of Physiology in Berlin and at the Institute of Parasitology in Paris. Afterwards he taught classes in general pathology at the University of Cagliari, returning to Pavia in 1922 as a full professor and as a successor to Camillo Golgi.
While an assistant at Pavia, he demonstrated with a severed peripheral nerve, that the stump attached to the cell body was able to survive and regenerate new branches, while its other stump, being detached from the cell body, degenerated. In 1910 he discovered that a Golgi body dissociated into a number of elongated structures during cell division. Perroncito named the split up pieces "dictyosomes".

Marcel Lermoyez (24 July 1858 – 1 February 1929) was a French otolaryngologist and surgeon who was a native of Cambrai.

Constantin Marie Le Paige (9 March 1852 – 26 January 1929) was a Belgian mathematician.
Born in Liège, Belgium, Le Paige began studying mathematics in 1869 at the University of Liège. After studying analysis under Professor Eugène Charles Catalan, Le Paige became a professor at the Université de Liège in 1882.
While interested in astronomy and the history of mathematics, Le Paige mainly worked on the theory of algebraic form, especially algebraic curves and surfaces and more particularly for his work on the construction of cubic surfaces. Le Paige remained at the university until his retirement in 1922.

Henri Duret (7 July 1849, Condé-sur-Noireau – 7 April 1921) was a French neurologist whose contributions to the knowledge of cerebral circulation and the physiology of the brainstem were important for the early years of brain surgery. For thirty years he was associated with "Faculté Libre de Médecine" in Lille, France, and became dean of the school. He also organized and directed Red Cross hospitals during World War I.
Among his publications was a monograph on intracranial tumors titled Les tumeurs de l’encéphale (1905), and a major work on craniocerebral injuries titled Traumatismes cranio-cérébraux (1921). Other noted writings by Duret are:

Etudes expérimentales et cliniques sur les traumatismes cérébreaux, (1878) Delahaye, Paris.
"The role of the dura mater and its nerves in cerebral traumatism", (1878) in Brain 1:29–47.

Charles Jean Julien Depéret (25 June 1854 – 18 May 1929) was a French geologist and paleontologist. He was a member of the French Academy of Sciences, the Société géologique de France and dean of the Science faculty of Lyon.
Charles Depéret was born in Perpignan. He started his career as a military doctor from 1877 to 1888. Initially posted in Algeria, he was later active in Sathonay. In 1888, he became lecturer at Aix-Marseille University, and in 1889 he became professor of geology at the University of Lyon. He died in Lyon.In 1892 he introduced the Burdigalian Stage (Lower Miocene) based on stratigraphic units found near Bordeaux and in the Rhône Valley. He was an advocate of the controversial prehistoric artifacts findings of Glozel. Along with Edward Drinker Cope, his name is associated with the so-called "Cope-Depéret rule", a law which asserts that in population lineages, body size tends to increase over evolutionary time.

Joseph Valentin Boussinesq (pronounced [ʒɔzɛf valɑ̃tɛ̃ businɛsk]; 13 March 1842 – 19 February 1929) was a French mathematician and physicist who made significant contributions to the theory of hydrodynamics, vibration, light, and heat.

René Leprince (1876 – 25 May 1929) was an early French silent film director best known for his silent films of the 1910s and 1920s.
In film, Leprince began as an actor in 1908 and dabbled with directing. In 1911 he moved into directing permanently and directed some 70 films between 1908 and 1929.

Henri Biva (23 January 1848 – 2 February 1929) was a French artist, known for his landscape paintings and still lifes. He focused primarily on the western suburbs of Paris, painting outdoors in the plein-air tradition; his style ranging between Post-Impressionism and Realism with a strong Naturalist component. Biva's pictures are characterized by intricate strokes and a pure palette bathed with warm natural light (Biva devoted great attention to light effects). The artist was a member of the Société des Artistes Français and a Knight of the Legion of Honour (Chevalier de la Légion d'Honneur).

Segundo Víctor Aurelio Chomón y Ruiz (also Chomont or Chaumont French: [ʃomɔ̃]; 17 October 1871 – 2 May 1929) was a pioneering Spanish film director, cinematographer and screenwriter. He produced many short films in France while working for Pathé Frères and has been compared to Georges Méliès, due to his frequent camera tricks and optical illusions. He is regarded as the most significant Spanish silent film director in an international context.