Note 20-* — The Philosophic Grammar of American Languages.
Reading edition
His teachings on this point, of which I give the barest outline, are developed in sections 12 and 13 of his Introduction, Ueber die Verschiedenheit, etc. Steinthal’s critical remarks on these sections (in his Charakteristik der haupt. Typen des Sprachbaues) seem to me unsatisfactory, and he even does not appear to grasp the chain of Humboldt’s reasoning.