Philippe Friedrich Dietrich 1790 to August 1792. At his home during a dinner in honor of the officers of the garrison of Strasbourg he asked the Captain Claude Joseph Rouget de Lisle, stationed in his city, to write the Song the Army of the Rhine, future "La Marseillaise". Rouget de l'Isle composed the song in the night of 24–25 April 1792. According to sources, Dietrich would have sung the song himself, accompanied on the piano by his wife, for he was very good musician. Baron Dietrich knew the Captain Rouget de l'Isle to be like him, a Freemason and attend the same Masonic
Emile Armet de Lisle de Lisle focused his studies on chemistry, and eventually he returned to work under his father in the family quinine business. For some time, Armet de Lisle worked as a consultant for Marie and Pierre Curie. The Curies had developed a method for extracting radium compounds from pitchblende (a radioactive ore), but the outlook of the procedure, called "fractional crystallization," was poor. Even with an abundance of pitchblende, only very minute amounts of usable radium could realistically be harvested through the tedious procedure. In 1904, de Lisle, realizing that such a process would likely benefit considerably from an industrial scale-up