LIST OF DIAGRAMSI.[TYPES OF FIRST DRAWINGS BY CHILDREN]II.[SHOWING WHERE SQUARENESSES MAY BE LOOKED FOR]III.[A DEVICE FOR ENABLING STUDENTS TO OBSERVE APPEARANCES AS A FLAT SUBJECT]IV.[SHOWING THREE PRINCIPLES OF CONSTRUCTION USED IN OBSERVING MASSES, CURVES, AND POSITION OF POINTS]V.[PLAN OF CONE ILLUSTRATING PRINCIPLES OF LIGHT AND SHADE]VI.[ILLUSTRATING SOME POINTS CONNECTED WITH THE EYES]VII.[EGG AND DART MOULDING]VIII.[ILLUSTRATING VARIETY IN SYMMETRY]IX.[ILLUSTRATING VARIETY IN SYMMETRY]X.[ILLUSTRATING INFLUENCE OF HORIZONTAL LINES]XI.[ILLUSTRATING INFLUENCE OF VERTICAL LINES]XII.[ILLUSTRATING INFLUENCE OF THE RIGHT ANGLE]XIII.[LOVE AND DEATH]XIV.[ILLUSTRATING POWER OF CURVED LINES]XV.[THE BIRTH OF VENUS]XVI.[THE RAPE OF EUROPA]XVII.[BATTLE OF S. EGIDIO]XVIII.[SHOWING HOW LINES UNRELATED CAN BE BROUGHT INTO HARMONY]XIX.[SHOWING HOW LINES UNRELATED CAN BE BROUGHT INTO HARMONY]XX.[THE ARTIST'S DAUGHTER]XXI.[THE INFLUENCE ON THE FACE OF DIFFERENT WAYS OF DOING THE HAIR]XXII.[THE INFLUENCE ON THE FACE OF DIFFERENT WAYS OF DOING THE HAIR]XXIII.[EXAMPLES OF EARLY ITALIAN TREATMENT OF TREES]XXIV.[THE PRINCIPLE OF MASS OR TONE RHYTHM]XXV.[MASS OR TONE RHYTHM IN "ULYSSES DERIDING POLYPHEMUS"]XXVI.[EXAMPLE OF COROT'S SYSTEM OF MASS RHYTHM]XXVII.[ILLUSTRATING HOW INTEREST MAY BALANCE MASS]XXVIII.[PROPORTION]