Note 8 — INTRODUCTION. THE EVOLUTION OF THE AFFECTIVE LIFE.

It is probable that the dates assigned for the first appearance of emotional manifestations by Darwin, Preyer, Perez, etc., are mostly too late, as they were not the outcome of continuous observation. Mrs. Kathleen Carter Moore, in her recent elaborate monograph dealing with the early mental development of her own baby, whom she regards as an average infant, observed the tear secretion first on the tenth day, though it was not fully established until the sixteenth week; a smile when comfortable was seen on the sixth day; the child smiled several times consecutively at his father on the seventh day with movements of excitement, and by the twentieth day smiling at persons had become more frequent and more intelligent. (See K. C. Moore, “The Mental Development of a Child,” Monograph Supplement to the Psychological Review, 1896).—ED.