1926 deaths

Charles Henry (1859–1926) was a French librarian and editor. He was born at Bollwiller, Haut-Rhin, and was educated in Paris, where in 1881 he became assistant and afterward librarian in the Sorbonne. As a specialist in the history of mathematics, he was sent to Italy to seek some manuscripts of that nature which the government wished to publish. He edited several works upon kindred subjects, as well as memoirs, letters, and other volumes, and wrote critiques upon the musical theories of Rameau and Wronski. He is also credited with the invention of several ingenious devices and instruments used in psychophysiological laboratories. He published C. Huet's correspondence under the title Un érudit, homme du monde, homme d'église, homme de cour (1880), and he issued also Problèmes de géométrie pratique (1884) and Lettres inédites de Mlle. de Lespinasse à Condorcet et à D'Alembert (1887).Charles Henry, a mathematician, inventor, esthetician, and intimate friend of the Symbolist and anarchist writers Félix Fénéon and Gustave Kahn, met Georges Seurat, Paul Signac and Camille Pissarro during the last Impressionist exhibition in 1886. Henry would take the final step in bringing emotional associational theory into the world of artistic sensation: something that would influence greatly the Neo-Impressionists. Henry and Seurat were in agreement that the basic elements of art—the line, particle of color, like words—could be treated autonomously, each possessing an abstract value independent of one another, if so chose the artist. In 1889 Fénéon noted that Seurat knew that the line, independent of its topographical role, possesses an assessable abstract value, in addition, to the individual pieces of color, and the relation of both to the observer's emotion.
The Neo-Impressionists established what was accepted as an objective scientific basis for their painting in the domain of color. The underlying theory behind Neo-Impressionism would have a lasting effect on the works produced in the coming years by the likes of Robert Delaunay. The Cubists were to do so in both form and dynamics, and the Orphists would do so with color too. The decomposition of spectral light expressed in Neo-Impressionist color theory of Paul Signac and Charles Henry played an important role in the formulation of Orphism. Robert Delaunay, Albert Gleizes, and Gino Severini all knew Henry personally.

Louis Georges Gouy (February 19, 1854 – January 27, 1926) was a French physicist. He is the namesake of the Gouy balance, the Gouy–Chapman electric double layer model (which is a relatively successful albeit limited model that describes the electrical double-layer which finds applications in vast areas of studies from physical chemistry to biophysics) and the Gouy phase.
Gouy was born at Vals-les-Bains, Ardèche in 1854. He became a correspondent of the Académie des sciences in 1901, and a member in 1913.

Joseph-Albert Deport (September 17, 1846 – November 1, 1926) best known as one of designers of the Canon de 75 modèle 1897.

Rudolf Albert Martin Boehm (Böhm) (19 May 1844, in Nördlingen – 19 August 1926, in Bad Kohlgrub) was a German pharmacologist, known for his work in the field of experimental pharmacology.
He studied medicine at the universities of Munich and Würzburg, and in 1868–70 served as an assistant to Franz von Rinecker at the Juliusspital in Würzburg. In 1871 he obtained his habilitation under Adolf Fick, then during the following year was named a professor of pharmacology, dietetics and history of medicine at the University of Dorpat. Later on, he worked as professor of pharmacology at the universities of Marburg (from 1881) and Leipzig (from 1884), where on four separate occasions he was named dean to the medical faculty. During his tenure at Leipzig, he oversaw the construction of its pharmacological institute (1886–88). Today the institute at Leipzig is known as the Rudolf-Boehm-Institut für Pharmakologie und Toxikologie.
His main research dealt with the pharmacological and toxicological properties of substances of plant origin and their effect(s) on the animal organism. He conducted extensive studies on the actions of digitalis, muscarine (a product of certain mushrooms), choline and curare. In 1895 he classified curare into three groups; "calabash curares" (usually taken from the family Loganiaceae, Strychnos species), "tubo curares" (derived from the family Menispermaceae) and "pot curares" (mixed Menispermaceae and Loganiaceae substances). He also performed significant research of carbohydrate metabolism.

Jean Alexandre Louis Promio (9 July 1868 – 24 December 1926) was a French film photographer and director. He is mentioned as a pioneer in film and was the director for Sweden's first Newsreel. The newsreel was shown for King Oscar II:s arrival at the General Art and Industrial Exposition on 15 May 1897.

Alexandre Promio came from an Italian family that moved to France and resided in Lyon. During his time as an assistant to an optician in Lyon, he witnessed the first presentation of the medium of moving pictures cinematograph. Promio was interested in the art of photography, and in March 1896 left his work at the optician to start working for Auguste and Louis Lumière. After just some time at the work he became the boss for the film unit and got the responsibility for the education of the first cinematograph-operators.His first assignment was to present and marketing of the new media worldwide. Promio visited several cities between April 1896 and September 1897. The first trip went to Madrid where he demonstrated the moving pictures on 13 May 1896 On 7 July he did a film demonstration for the Tsar Nikolaj II of Russia and the empress of Saint Petersburg, after that he visited England, Germany and Hungary. In September 1896, he arrived in the US, and filmed the first films of Chicago. In Italy he on 25 October 1896 filmed the city of Venice from a Gondola. The film had its premiere on 13 December 1897 in Lyon under the title of Panorama du Grand Canal vu d'un bateau which shows the short trip of Canal Grande. It was most likely the world's first moving film, also the first being filmed by a moving camera.After 1898 he did not do anymore travels and resided permanently in Lyon France where he continued to be an employee of Lumière. In 1907 he filmed for Pathé and between 1914 and 1915 he was a soldier in the first world war. After his duty in the war he became a still photographer and film photographer to the Algerian government, there he created 3000 photographs and 38 documentary films. He returned to France sick and resided in Asnières-sur-Seine near Paris. He died in his home on Christmas eve 1926. His death however was not announced until four months after.

François Marie Gabriel Delanne (23 March 1857 – 15 February 1926) was a notable French spiritist, psychical researcher, writer, and electrical engineer. He is best known for his book, "Le Phénomène spirite" (The Spiritist phenomenon).

Adolphe Léon Willette (30 July 1857 in Châlons-sur-Marne – 4 February 1926 in Paris) was a French painter, illustrator, caricaturist, and lithographer, as well as an architect of the famous Moulin Rouge cabaret. Willette ran as an "anti-semitic" candidate in the 9th arrondissement of Paris for the September 1889 legislative elections.

André Alphonse Toussaint Wormser (1 November 1851 – 4 November 1926) was a French Romantic composer.

Albert Robida (14 May 1848 – 11 October 1926) was a French illustrator, etcher, lithographer, caricaturist, and novelist. He edited and published La Caricature magazine for 12 years. Through the 1880s, he wrote an acclaimed trilogy of futuristic novels. In the 1900s he created 520 illustrations for Pierre Giffard's weekly serial La Guerre Infernale.

August Thyssen (German: [ˈaʊɡʊst ˈtʏsn̩]; 17 May 1842 – 4 April 1926) was a German industrialist, founder and controlling shareholder of Thyssen & Co (presently ThyssenKrupp). He was a prominent member of the Thyssen family.