Jean Fé·lix /ʒɑ̃ feɪˈliks/Show Spelled[zhahn fey-leeks]Show IPA, 1884–1963, U.S. chemist and aeronautical engineer, born in Switzerland (brother of Auguste).
Auguste (oɡyst). 1884--1962, Swiss physicist, whose study of cosmic rays led to his pioneer balloon ascents in the stratosphere (1931--32)
2.
his twin brother, Jean Félix (ʒɑ̃ feliks). 1884--1963, US chemist and aeronautical engineer, born in Switzerland, noted for his balloon ascent into the stratosphere (1934)