He remained there for the rest of his life but, after 1874, he was an examiner at the École. Bertrand, who was a great admirer of his work, supported him for election to the Academy of Sciences, and also supported his appointment to an additional post, namely that of professor of mathematical physics at the Collège de France.
Siya ay nanatili doon sa ang magpahinga ng kanyang buhay ngunit, matapos ang 1874, siya ay isang tagasuri sa École. Bertrand, na noon ay isang magaling na admirer ng kanyang trabaho, suportado sa kanya para sa halalan sa Academy of Sciences, at sinusuportahan din ng kanyang mga appointment sa isang karagdagang post, namely na ng mga propesor ng matematika at pisika ang College de France.