on origin of the personal pronoun, [210];
on evolution of language, [241];
on demonstrative elements, [244], [423];
on roots of Sanskrit, [267-289];
on undifferentiated language of young children, [296], [317];
on sentence-words, [298-300], [317];
on gesture origin of pronouns, [302],
and of language in general, [354];
on origin of adjectives, [306];
on the origin of verbs, [307];