Academic staff of \u00c9cole Polytechnique

Clément Georges Lemoine (16 January 1841 in Tonnerre – 13 November 1922 in Paris) was a French chemist and hydrologist. He was the father of geologist Paul Lemoine (1878–1940).
He studied at the École Polytechnique and the École des ponts et chaussées, obtaining a doctorate in physical sciences in 1865. For many years he was associated with the École Polytechnique in Paris, where he ultimately served as a professor of chemistry from 1898 to 1911.In 1866 he began work as an engineer in charge of hydrometric services in the Seine Basin. In 1881 he was appointed chief engineer of bridges and roads, and in 1901, was named inspector general of bridges and roads. He is credited with organizing a flood warning service throughout France.As a chemist he discovered phosphorus sesquisulfide, a compound that will later be used in the manufacture of matches. He continued research on the allotropic transformation of phosphorus, and was also the author of works on chemical equilibria.In 1899 he became a member of the Académie des sciences (chemistry section), of which in 1921, he was named its president.

Hervé Auguste Étienne Albans Faye ((1814-10-01)1 October 1814 – (1902-07-04)4 July 1902) was a French astronomer, born at Saint-Benoît-du-Sault (Indre) and educated at the École Polytechnique, which he left in 1834, before completing his course, to accept a position in the Paris Observatory to which he had been appointed on the recommendation of M. Arago. It was during his time at the École Polytechnique that he developed his interest in astronomy.He studied comets, and discovered the periodic comet 4P/Faye on 22 November 1843. His discovery of "Faye's Comet" attracted worldwide attention, and won him the 1844 Lalande Prize and a membership in the French Academy of Sciences. In 1848 he became an instructor in geodesy at the Polytechnique, and in 1854 rector of the academy at Nancy and professor of astronomy in the faculty of science there. Other promotions followed in succeeding decades. He became Minister of Public Instruction in the Rochebouet cabinet in 1877, a position which he held only briefly.
Faye served as the President of the Société Astronomique de France (SAF), the French astronomical society, from 1889 to 1891. He also served as president of the International Geodetic Association from 1892 to 1902.His work covered the entire field of astronomical investigation. It comprised the determination of comet periods, the measurement of parallaxes, and the study of stellar and planetary movements. He also studied the physics of the sun. He advanced several original theories on the nature and form of comets, meteors, the aurora borealis, and the sun.

Élisabeth Badinter (née Bleustein-Blanchet; born 5 March 1944) is a French philosopher, author and historian.
She is best known for her philosophical treatises on feminism and women's role in society. She is an advocate of liberal feminism and women migrant workers' rights in France. Badinter is described as having a commitment to Enlightenment rationalism and universalism. She advocates for a "moderate feminism". A 2010 Marianne news magazine poll named her France's "most influential intellectual", primarily on the basis of her books on women's rights and motherhood.Badinter is the largest shareholder of Publicis Groupe, a multinational advertising and public relations company, and the chairwoman of its supervisory board. She received these shares in an inheritance from her father, Marcel Bleustein-Blanchet, who founded the company. According to Forbes, she is one of the wealthiest French citizens with a fortune of around US$ 1.8 billion in 2012.