Members of the French Academy of Sciences

Guglielmo Libri Carucci dalla Sommaja (1 January 1803 – 28 September 1869) was an Italian count and mathematician, who became known for his love and subsequent theft of ancient and precious manuscripts. After being appointed the Inspector of Libraries in France, Libri began stealing the books he was responsible for. He fled to England when the theft was discovered, along with 30,000 books and manuscripts inside 18 trunks. In France, he was sentenced to 10 years in jail in absentia; some of the stolen works were returned when he died, but many remained missing.

Charles Joseph Étienne Wolf (9 November 1827 in Vorges – 4 July 1918) was a French astronomer.
In 1862, Urbain Le Verrier offered him a post as assistant at the Paris Observatory.
In 1867 he and Georges Rayet discovered Wolf–Rayet stars.
He was elected to the positions of Vice-President (1897) and President (1898) of the French Academy of Sciences.

Pierre Lelong (14 March 1912 Paris – 12 October 2011) was a French mathematician who introduced the Poincaré–Lelong equation, the Lelong number and the concept of plurisubharmonic functions.

Paul Ulrich Villard (28 September 1860 – 13 January 1934) was a French chemist and physicist. He discovered gamma rays in 1900 while studying the radiation emanating from radium.

René Truhaut (May 23, 1909 – May 10, 1994) was a French toxicologist. He was made chairman of the department of toxicology at the Paris Faculty of Medicine. He is known for having introduced the concept of daily intake in 1956, and for coining the term "ecotoxicology" (in 1969) which defined it as "the branch of toxicology concerned with the study of toxic effects, caused by natural or synthetic pollutants, to the constituents of ecosystems, animal (including human), vegetable and microbial, in an integral context”.

Henri Édouard Tresca (12 October 1814 – 21 June 1885) was a French mechanical engineer, and a professor at the Conservatoire National des Arts et Métiers in Paris.

Jules Tannery (24 March 1848 – 11 December 1910) was a French mathematician, who notably studied under Charles Hermite and was the PhD advisor of Jacques Hadamard. Tannery's theorem on interchange of limits and series is named after him. He was a brother of the mathematician and historian of science Paul Tannery.
Under Hermite, he received a doctorate in 1874 for his thesis Propriétés des intégrales des équations différentielles linéaires à coefficients variables.
Tannery was an advocate for mathematics education, particular as a means to train children in logical consequence through synthetic geometry and mathematical proofs.Tannery discovered a surface of the fourth order of which all the geodesic lines are algebraic. He was not an inventor, however, but essentially a critic and methodologist. He once remarked, "Mathematicians are so used to their symbols and have so much fun playing with them, that it is sometimes necessary to take their toys away from them in order to oblige them to think."
He notably influenced Pierre Duhem, Paul Painlevé, Jules Drach, and Émile Borel to take up science.
His efforts were mainly directed to the study of the mathematical foundations and of the philosophical ideas implied in mathematical thinking.
Tannery was "an original thinker, a successful teacher, and a writer endowed with an unusually clear, brilliant and attractive style."

Eugène Louis Simon (French pronunciation: [øʒɛn lwi simɔ̃]; 30 April 1848 – 17 November 1924) was a French naturalist who worked particularly on insects and spiders, but also on birds and plants. He is by far the most prolific spider taxonomist in history, describing over 4,000 species.

Paul Séjourné (21 December 1851; Orléans – 19 January 1939; Paris) was a French engineer who specialized in the construction of large bridges from masonry, a domain in which he made some important innovations.

Evry Léon Schatzman (16 September 1920 – 25 April 2010) was a French scientist hailed as "the father of modern French astrophysics".