CS1: Julian\u2013Gregorian uncertainty

Léon_Clément_Le_Fort

Léon Clément Le Fort (5 December 1829, Lille – 19 October 1893) was a French surgeon remembered for his work on uterine prolapse, including Le Fort's operation. He also described Le Fort's fracture of the ankle and Le Fort's amputation of the foot.

William_Rainey_Harper

William Rainey Harper (July 24, 1856 – January 10, 1906) was an American academic leader, an accomplished semiticist, and Baptist clergyman. Harper helped to establish both the University of Chicago and Bradley University and served as the first president of both institutions.

Sir_Alexander_Boswell,_1st_Baronet

Sir Alexander Boswell, 1st Baronet, (9 October 1775 – 27 March 1822) was a Scottish poet, antiquary, and songwriter. The son of Samuel Johnson's friend and biographer James Boswell of Auchinleck, he used the funds from his inheritance to pay for a seat in Parliament and then successfully sought a baronetcy for his political support of the government. However, his finances subsequently collapsed and he was revealed as the author of violent attacks on a rival. Boswell died as a result of wounds received in a duel.

Max_Joseph_von_Pettenkofer

Max Joseph Pettenkofer, ennobled in 1883 as Max Joseph von Pettenkofer (3 December 1818 – 10 February 1901) was a Bavarian chemist and hygienist. He is known for his work in practical hygiene, as an apostle of good water, fresh air and proper sewage disposal. He was further known as an anti-contagionist, a school of thought, named later on, that did not believe in the then novel concept that bacteria were the main cause of disease. In particular he argued in favor of a variety of conditions collectively contributing to the incidence of disease including: personal state of health, the fermentation of environmental ground water, and also the germ in question. He was most well known for his establishment of hygiene as an experimental science and also was a strong proponent for the founding of hygiene institutes in Germany. His work served as an example which other institutes around the world emulated.

Ambrosius_Hubrecht

Ambrosius Arnold Willem Hubrecht (2 March 1853, in Rotterdam – 21 March 1915, in Utrecht) was a Dutch zoologist.
Hubrecht studied zoology at Utrecht University with Harting and Donders, for periods joining Selenka in Leiden and later Erlangen, and Gegenbauer in Heidelberg. He graduated magna cum laude with Harting in 1874 with a study on nemertine worms. In 1875–1882 he worked at the Rijksmuseum van Natuurlijke Historie in Leiden, where he was the curator of ichthyology and herpetology, and in 1882 became professor at Utrecht. In 1890–1891 he traveled in Java, Sumatra, and Borneo, where he made embryological studies, notably on the tarsier. He visited the United States in 1896 and 1907. Honorary degrees were conferred on him by Princeton University, the University of St Andrews, the University of Dublin, the University of Glasgow (LL.D 1901), and the University of Giessen.
Hubrecht´s most important work was in embryology and placentation of the mammals. In papers in the Quarterly Journal of Microscopial Science in 1883 and 1887 he put forth the theory—also held by Sir E. Ray Lankester—that the vertebrates originated in a Nemertine form, basing this on his discovery in the Nemertines of a continuous nerve sheath. The Descent of the Primates (1897) is the title under which were published his lectures at the sesquicentennial celebration at Princeton.
In 1883 he became member of the Royal Netherlands Academy of Arts and Sciences. Hubrecht founded the Institut Internationale d'Embryologie, today known as the International Society of Developmental Biologists.

Édouard_Marie_Heckel

Dr. Édouard Marie Heckel (March 24, 1843 – January 20, 1916) was a French botanist and medical doctor, and director of the Jardin botanique E.M. Heckel in Marseille.
Heckel was born in Toulon, studied pharmacy and medicine, and in 1861 visited the Caribbean and Australia. In 1875, he was appointed professor in the faculty of sciences at Marseille, and in 1877 professor of medicine. He became a professor of natural history in Nancy in 1878, and is known for his studies of tropical plants and their use as medicinal plants and oilseeds.
From 1885, Heckel turned to the study of tropical plants such as medicinal or industrial oilseeds. In 1893 he founded the Colonial Institute and Museum of Marseille and creates a tropical pathology professorship at the medical school.
In 1887, he won the Prix Barbier from the French Academy of Sciences.In 1896, French botanist Jean Baptiste Louis Pierre named a genus of flowering plants (belonging to the family Meliaceae) from western central Tropical Africa, Heckeldora in his honour.In 1901, he launched the idea of creating an exhibition devoted exclusively to French colonies. This project would be supported by Jules Charles-Roux, who would become the Commissioner General while Heckel was his deputy. The exhibition was held at Parc Chanot in Marseille and was a great success from its opening on April 14, 1906 to its closure Nov. 18, 1906.

Maurice_Hamy

Maurice Théodore Adolphe Hamy (31 October 1861, Boulogne-sur-Mer – 9 April 1936, Paris) was a French astronomer.
He obtained in 1887 a doctorate from the Faculté des sciences de Paris with dissertation Étude sur la figure des corps célestes. In the 1890s he applied his method of interference fringes to an analysis of errors made in astronomical observations using meridian circles. He used his interference method to confirm Barnard's measurement of the apparent diameter of Venus. Hamy participated in the creation of l'Institut d'optique théorique et appliquée (SupOptique).
He won the prix Lalande in 1895. Filling the empty chair created by the death of Jules Janssen, Hamy was elected in 1908 a member of l'Académie des sciences and then in 1928 its president. He was also elected a member of the Bureau des longitudes.
He is a nephew of Ernest Hamy.

Paul_Gibier

Paul Gibier (October 9, 1851–June 23, 1900) was a French medical doctor and bacteriologist, a researcher into contagious diseases, who founded the New York Pasteur Institute. This was a pioneering private research laboratory concerned with developing bio-medical cures including vaccines and anti-toxins. He was also known for his interest in psychic phenomena.