la mesure de la simplicité dans les constructions géométriques in the Comptes rendus of the Académie française. He published additional papers on the subject in Mathesis (1888), Journal des mathématiques élémentaires (1889), Nouvelles annales de mathématiques (1892), and the self-published La Géométrographie ou l'art des constructions géométriques, which was presented at the meeting of the Association Française in Pau (1892), and again at Besançon (1893) and Caen (1894). After this, Lemoine published another series of papers, including a series on what he called transformation continue (continuous transformation), which related mathematical equations to geometrical objects. This meaning stood separately from the modern definition of transformation. His papers on this subject included, Sur les transformations systématiques des formules relatives au triangle (1891), Étude sur une nouvelle transformation continue (1891), Une règle d'analogies dans le triangle et la spécification de certaines analogies à une transformation dite transformation continue (1893), and Applications au tétraèdre de la transformation continue (1894). In 1894, Lemoine co-founded another mathematical journal entitled, L'intermédiaire des mathématiciens along with Charles Laisant, a friend whom he met at the École Polytechnique. Lemoine had been planning such a journal since early 1893, but thought that he would be too busy to create it. At a dinner with Laisant in March 1893, he suggested the idea of the journal. Laisant cajoled him to create the journal, and so they approached the publisher Gauthier-Villars, which published the first issue in January 1894. Lemoine served as the journal's first editor, and held the position for several years. The year after the journal's initial publication, he retired from mathematical research, but continued to support the subject. Lemoine died on 21 February 1912 in his home city of Paris. Contributions Lemoine's work has been said to contribute towards laying the foundation of modern triangle geometry. The American Mathematical Monthly, in which much of Lemoine's work is published, declared that "To none of these [geometers] more than Émile-Michel-Hyacinthe Lemoine is due the honor of starting this movement [of modern triangle geometry] ..." At the annual meeting of the Paris Academy of Sciences in 1902, Lemoine received the 1,000-franc Francœur prize, which he held for several years. Lemoine point and circle In his 1874 paper, entitled Note sur les propriétés du centre des médianes antiparallèles dans un triangle, Lemoine proved the concurrency of the symmedians of a triangle; the reflections of the medians of the triangle over the angle bisectors.