Ondas que llevan idioma nacional. Las Lecciones de Florencio Garrigós en la Escuela del Aire

: In 1940, the Argentine journalist, grammarian and teacher Florencio Garrigós published his Lecciones de idioma nacional . Within the framework of linguistic historiog -raphy, we aim to analyze the specific features that this work presents in the history of Argentine school grammar. To do this, we first reconstruct the professional career of its author; then, we present the Escuela del Aire, the first distance education experience that used the radio in Argentina. Finally, we analyze the text of the Lecciones , and argue that it is an innovative work in at least two senses: because of the didactic innovation that it proposes and because of the defined perspective it adopts regarding the Argen tinian linguistic variation phenomena, which it values positively.