Joseph Louis (ʒozɛf lwi). 1778–1850, French physicist and chemist: discovered the law named after him (1808), investigated the effects of terrestrial magnetism, isolated boron and cyanogen, and discovered methods of manufacturing sulphuric and oxalic acids
Gay-Lussac in American English
(geɪlyˈsak)
Joˈseph Louis (ʒɔˈzɛf lwi) 1778-1850; Fr. chemist & physicist