This work, on its appearance, made an epoch in the treatment of educational theory in Germany. Johann Karl Friedrich Rosenkranz was born in 1805. In 1833 he became Professor of Philosophy at Koningsberg, and occupied for forty-six years, until his death in 1879, the chair held for twenty-four years by the celebrated Herbart, and for thirty-four years by the still more celebrated Kant. He wrote extensive works on philosophy and literature, and published the present work in 1848.