Originally published in 1937, this book presents a comprehensive analysis of the nature of visual perception. The text is divided into four main sections: the first part focuses on tracing the phenomenal development of the perceptual process; the second deals with the relation of the perceptual content to some of the more important affective and quasi-affective individual states; the third discusses the objective structure of the visual field; the fourth briefly describes some aspects of the genetic development of the perceptual content in childhood. An appendix section on the tachistoscope and indices are also included. This book will be of value to anyone with an interest in perspectives on the nature of visual perception.