Scientists from Metz

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.

Jean-Victor Poncelet (French pronunciation: [ʒɑ̃ viktɔʁ pɔ̃slɛ]; 1 July 1788 – 22 December 1867) was a French engineer and mathematician who served most notably as the Commanding General of the École Polytechnique. He is considered a reviver of projective geometry, and his work Traité des propriétés projectives des figures is considered the first definitive text on the subject since Gérard Desargues' work on it in the 17th century. He later wrote an introduction to it: Applications d'analyse et de géométrie.As a mathematician, his most notable work was in projective geometry, although an early collaboration with Charles Julien Brianchon provided a significant contribution to Feuerbach's theorem. He also made discoveries about projective harmonic conjugates; relating these to the poles and polar lines associated with conic sections. He developed the concept of parallel lines meeting at a point at infinity and defined the circular points at infinity that are on every circle of the plane. These discoveries led to the principle of duality, and the principle of continuity and also aided in the development of complex numbers.As a military engineer, he served in Napoleon's campaign against the Russian Empire in 1812, in which he was captured and held prisoner until 1814. Later, he served as a professor of mechanics at the École d'application in his home town of Metz, during which time he published Introduction à la mécanique industrielle, a work he is famous for, and improved the design of turbines and water wheels. In 1837, a tenured 'Chaire de mécanique physique et expérimentale' was specially created for him at the Sorbonne (the University of Paris). In 1848, he became the commanding general of his alma mater, the École Polytechnique. He is honoured by having his name listed among notable French engineers and scientists displayed around the first stage of the Eiffel tower.