817 - ASTRONOMERS - MATHEMATICIANS & OTHERS

ASTRONOMERS - MATHEMATICIANS & OTHERS -JANSSEN, Pierre Jules César (1824–1907), French astronomer. L.A.S. Meudon, February 23, 1883. 1 p. in-8. Letterhead of the Paris Observatory of Physical Astronomy. Mounted. Letter of recommendation for the son of physicist Achille Cazin (1832–1877), who wishes to study the natural sciences and is seeking an internship at the Concarneau Observatory through his mother, the writer Jeanne Braive (1839–1923). -DEHÉRAIN, Pierre-Paul (1830–1902), French agronomist. Letter regarding a bereavement. No place, January 19, 1900. 1 p., in-8. He mentions his colleague Émile Demoussy (1866–1942), an agronomist and chemist; the physician Duflocq, etc. -BOUQUET DE LA GRYE, Anatole (1827–1909), French hydrographer. Letter, 1887. -LEVASSEUR, Pierre Émile (1828–1911), French economist, statistician, and geographer. L.A.S. Antwerp, August 16, 1871. -LE VERRIER, Urbain (1811–1877), astronomer and mathematician, specialist in celestial mechanics and founder of modern meteorology. Letter and galley proofs addressed to Théodore Bailleul for Volume XV of the Annals of the Imperial Observatory of Paris. [1861] -SIEBOLD. Letter regarding the Annals of Natural Sciences (Zoology). Munich, 1853. -BISCHOFFSHEIM, Raphaël (1823–1906), astronomer and patron of the arts, founder of the Nice Observatory. Letter to the zoologist Henri MILNE-EDWARDS (1800–1885). 1878. -CHAUVEAU, Auguste (1827–1917), veterinarian, physiologist, and anatomist. Letter from the author to his colleague Bouchard. -MARION, Henri (1846–1896), French philosopher, educator, and professor of pedagogy. Letter from the author, Paris, October 31, 1895. An interesting document concerning a dispute. Regarding his rivals, “who, incidentally, do not promote the education of freedom—the only kind our time needs. But my insights were not particularly appreciated; and the academics who do the worst work are those who resented me the most for reminding them of our ideal […].” -HERMITE, Charles (1822–1901), mathematician. L.A.S. Paris, November 18, 1879. 1 p. in-8. “[…] I fully agree with the opinion of those of our colleagues who have expressed the wish that mathematics courses continue to be held at the Sorbonne […] .” -GERONO, Camille-Christophe (1799–1892), mathematician. L.A.S. 1860. 1 p. in-8. Regarding the proofs of articles on mathematics reviewed by him and his colleague, the mathematician Olry Terquem (1782–1862). Together, they had founded the famous *Nouvelles annales de mathématiques* in 1842. -BERTRAND, Joseph (1822–1900), mathematician. L.A.S. Contrexéville, August 19, 1876. 1½ p. in-12. -JAMIN, Jules (1818–1886), French physicist. L.A.S. No place, no date. -MOUCHEZ, Ernest (1821–1892), astronomer, director of the Paris Observatory from 1878 to 1892. Signed autograph letter. Paris, “January 7,” undated. 1 p. in-8. Letterhead of the Paris Observatory. -BROUARDEL, Paul (1837–1906), medical examiner. No place, no date. ½ p., oblong 16mo. Autograph, initialed calling card. -PRESSENSÉ, Francis Charles de (1853–1914), founder and president of the League for Human Rights from 1903 to 1914. Autograph letter addressed to Julien Penel (1843–1908). No place, no date. 1½ pages, in-8 format. “Pressens,” in a “painful predicament,” threatens to commit suicide: “Do you want to drive me to despair? I will always have enough small change left to cover the cost of purchasing the state-of-the-art revolver with which I will blow my brains out […].” -BERSOT, Ernest (1816–1880), director of the École normale supérieure from 1871 until his death. Autograph letter.