Notable : Famous : Founder/ originator

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-Félix Henneguy (18 March 1850 – 16 January 1928) was a French zoologist and embryologist born in Paris.
In 1875, he received his medical doctorate from the University of Montpellier with a dissertation on the physiological action of poisons, Étude physiologique sur l'action des poisons. In 1883 he obtained his agrégation with Les lichens utiles, a thesis on useful lichens.
During his career he was a professor of comparative embryology at the Collège de France (1900–28), and a member of the Académie de Médecine, the Académie d'Agriculture and the Académie des sciences (1908–28). From 1894 he was director of the journal, Archives d'anatomie microscopique.
He is known for his extensive research of phylloxera, publishing a number of papers on means of destroying its eggs during the winter (1885, 1887–88). Also he performed studies on the natural history of the apple blossom weevil, proposing methods for its eradication (1891). On behalf of the Marine Fisheries Advisory Committee, he did reviews involving the sale and consumption of mussels throughout the year.
With Hungarian neuroanatomist, Mihály Lenhossék (1863–1937), the "Henneguy–Lenhossek theory" is named, which states the claim that mitotic centrioles and ciliary basal kinetosomes are fundamentally the same structure.As a taxonomist he circumscribed the apicomplexan genus Rhytidocystis, and the protozoan genera Thelohania and Fabrea. The genus Henneguya Thélohan, 1892 is named after him, as are the species Apherusa henneguyi Chevreux & Fage, 1925 and Ectinosoma henneguyi Labbé, 1926.In 1903 he was appointed president of the Société entomologique de France.

Gustav Hauser (13 July 1856 in Nördlingen – 30 June 1935 in Erlangen) was a German pathologist and bacteriologist.
He studied medicine at the Universities of Munich and Erlangen, where he worked as an assistant in the gynecological clinic under Paul Zweifel and at the pathological institute of Friedrich Albert von Zenker. In 1883 he obtained his habilitation for pathological anatomy and bacteriology, and in 1895 became a full professor and director of the institute of pathology in Erlangen.In 1885, Hauser was the first to isolate the bacillus Proteus vulgaris. He is also credited with developing a formalin for the preservation of bacterial cultures.In Erlangen, the thoroughfare Gustav-Hauser-Straße is named in his honor.

Carl (or Karl) Otto Harz (28 November 1842 in Gammertingen – 5 December 1906 in Munich) was a German mycologist, pharmacist and botanist.
After spending time as an intern in several pharmacies, he studied botany at the University of Berlin. Later, he relocated to Munich, where he served as a lecturer at the Technische Universität München (from 1873) and at the Tierärztlichen Hochschule (from 1874). In 1880 he was appointed professor of botany and pharmacognosy at the Tierärztlichen Hochschule.In 1877, with pathologist Otto Bollinger, he conducted early studies of actinomycosis in cattle, and is credited for naming the causal agent Actinomyces bovis. From his observations, he believed the culprit to be a mould, related to the genera Botrytis or Monosporium.As a taxonomist, he circumscribed a number of varieties from the species Cucurbita pepo. His name is associated with the following mycological genera:

Harzia (family Ceratostomataceae), named by Julien Noël Costantin (1888).
Harziella (family Chaetomiaceae), named by Otto Kuntze (1891).

Henri Albert Hartmann (16 June 1860 – 1 January 1952) was a French surgeon. He wrote numerous papers on a wide variety of subjects, ranging from war injuries to shoulder dislocations to gastrointestinal cancer. Hartmann is best known for Hartmann's operation, a two-stage colectomy he devised for colon cancer and diverticulitis.

David Paul von Hansemann (5 September 1858 – 1920) was a German pathologist born in Eupen, east Belgium. He is remembered for his work in the field of oncology, in particular, his concept pertaining to anaplasia of cancer cells.
He studied medicine at the Universities of Berlin, Kiel and Leipzig, and following graduation spent nine years as an assistant to Rudolf Virchow (1821-1902) in Berlin. In 1890 he became habilitated in pathological anatomy, and in 1897 obtained the title of professor. In 1907 he began work as a prosector at Friedrichshain city hospital. During World War I he served as an army pathologist.
His name is associated with "Hansemann macrophages" (also known as "Hansemann cells"), which are large mononuclear cells containing Michaelis-Gutmann bodies that affect the urinary tract or kidney.

Alphonse François Marie Guérin (French pronunciation: [alfɔ̃s fʁɑ̃swa maʁi ɡeʁɛ̃]; August 9, 1816 – February 21, 1895) was a French surgeon who was a native of Ploërmel.
He studied medicine in Paris, and in 1850 became a surgeon of Parisian hospitals. During his career, he practiced surgery at the Lourcine, Cochin, Hôpital Saint-Louis and Hôtel-Dieu. In 1868 he became a member of the French Académie Nationale de Médecine.
In 1870, Guérin introduced the practice of using cotton-wool bandages for prevention of wound infections. He described a horizontal fracture of the maxilla immediately above the teeth and palate, that is known today as a "Le Fort I fracture", or sometimes as a "Guérin fracture".

Adolphe-Marie Gubler (5 April 1821 – 20 April 1879) was a French physician and pharmacologist born in Metz.
Originally a student of botany, he began his medical studies in 1841 at Paris, where he was a pupil of Armand Trousseau (1801–1867). In 1845 he became an interne des hôpitaux, earning his doctorate in 1849. Afterwards he worked as a physician at the Hôpital Beaujon, and in 1853 earned his agrégation with a thesis on cirrhosis of the liver. In 1868 he was appointed professor of therapy to the medical faculty in Paris, maintaining this position until his death in 1879.
Gubler made a number of contributions in the fields of medicine and pharmacology. He is credited with being the first physician to differentiate between hematogenous and hepatogenous icterus. His name is associated with "Millard–Gubler syndrome", a condition characterized by softening of brain tissue that is caused by blockage of blood vessels of the pons. The disease is named in conjunction with Auguste Louis Jules Millard (1830–1915), who initially described the disorder in 1855. The eponymous "Gubler's line" is a line of superficial origin of the trigeminal nerve on the pons, a lesion below which results in the aforementioned Millard–Gubler syndrome.
He was the author of many works on botany, clinical medicine, physiology and pharmacology, with several articles on the latter subject being published in the "Journal de thérapeutique". Among his better written efforts was an 1856 treatise on hemiplegia titled De l'hémiplégie alterne envisagée comme signe de lésion de la protubérance annulaire et comme preuve de la décussation des nerfs faciaux, and a major publication involving pharmacopoeia called Commentaires thérapeutiques du codex medicamentarius, a book that was awarded the "Chaussier Prize" (Prix Chaussier, named after anatomist François Chaussier) by the Académie des sciences.Gubler was a founding member of the Société de biologie, and in 1865 became a member of the Académie de médecine.
While still an interne, he was asked by Dr. Trousseau to serve as a traveling companion to a young man suffering from emotional distress. While in Milan, Gubler was seriously wounded by a gunshot from his companion, forcing him to spend a year recuperating in Milan.

Icilio Guareschi (24 December 1847 – 20 June 1918) was an Italian chemist.
Icilio Guareschi studied at the University of Bologna and received his Ph.D there in 1871. He became professor at the University of Siena and in 1879 at the University of Turin, where he worked until his death in 1918.
Guareschi worked in the field of organic chemistry, pharmacy, toxicology and the history and chemistry. In 1894 he discovered a reaction to synthesise 2-Pyridones, today known as the Guareschi-Thorpe condensation.

Augustin Grisolle (10 February 1811 – 9 February 1869) was a French physician born in Fréjus.
Grisolle was a professor at the Paris faculty of medicine and a member of the Académie de Médecine. He was the author of the two-volume "Traité élémentaire et pratique de pathologie interne" (1844).
His name is associated with "Grisolle's sign", an obsolete sign once affiliated with smallpox. It involved feeling the presence of papules when the skin is stretched.