Translated by Robert Morris Ogden. xix, 427pp. Thick 8vo, original deep green gilt-lettered cloth (neatly inked signature inside covere, otherwise a near fine copy). New York: Harcourt, Brace & Company & London: Kegan Paul, Trench, Trubner & Co., 1928. Second edition, revised. From the series: International Library of Psychology and Scientific Method.