Georges Le Monnier was born in Bordeaux in 1843 and then became a student at the École Normale Supérieure (until 1863), became an associate in physics (1866), Doctor of Science (1873), teacher at the Lycée de Niort (1866), trainer at the École Normale Supérieure (1869), professor of physics at the lycée in Pau (1874), lecturer in botany and zoology at the faculty of sciences in Besançon (1874), lecturer in botany at the faculty of sciences in Nancy (1877), then finally professor (in 1877) and honorary professor (in 1912).

[8] He was a very close friend of Auguste Daum (French ceramist) and Émile Gallé (artist and designer who worked in glass).

[3] The latter wrote in one of these notebooks: "M. Le Monnier, professor of botany at the Faculty of Sciences of Nancy, gave a lecture on the Darwinian movement in 1877 to a very diverse audience, both male and female.

Le Monnier succeeded in making known the great Darwinian movement to a varied public, without the audience, however intelligent, experiencing boredom or fatigue.

His gifts of clarity, simplicity, elegance, which distinguish the professor's speech, the lecturer possessed to the highest degree."