Ma nemmuqel leqdicat i yemmugen ɣef tutlayt n tmaziɣt ad naf tuget n yimeskaren-nsen d iserdasen neɣ d irgazen n tesreḍt, ad d-nebder seg-sen leqdic n J.M.Dallet i d-yeffɣen deg useggas 1982, akked Charles de Foucault deg 1951.