Compendium der vergleichenden Grammatik der indogermanischen Sprachen

August Schleicher (1821-1868) paved the way for modern historical linguistics with his 'family tree' model of language relationships and his early reconstruction of Proto-Indo-European. This influential 1861 book, derived from Schleicher's lectures on comparative grammar, presents the phonology and morphology of the reconstructed proto-language and its successors.