tag="{http://www.w3.org/1999/xhtml}a">STUDIES IN PERCEPTION.

      Eye-Movement and Central Anæsthesia: Edwin B. Holt 3 Tactual Illusions: Charles H. Rieber 47 Tactual Time Estimation: Knight Dunlap 101 Perception of Number through Touch: J. Franklin Messenger 123 The Subjective Horizon: Robert MacDougall 145 The Illusion of Resolution-Stripes on the Color-Wheel: Edwin B. Holt 167   STUDIES IN MEMORY.   Recall of Words, Objects and Movements: Harvey A. Peterson 207 Mutual Inhibition of Memory Images: Frederick Meakin 235 Control of the Memory Image: Charles S. Moore 277   STUDIES IN ÆSTHETIC PROCESSES.   The Structure of Simple Rhythm Forms: Robert MacDougall 309 Rhythm and Rhyme: R.H. Stetson 413 Studies in Symmetry: Ethel D. Puffer 467 The Æsthetics of Unequal Division: Rosewell Parker Angier 541   STUDIES IN ANIMAL PSYCHOLOGY.   Habit Formation in the Crawfish, Camburus affinis: Robert M. Yerkes and Gurry E. Huggins 565 The Instincts, Habits and Reactions of the Frog: Robert Mearns Yerkes 579   STUDIES IN PSYCHOLOGICAL THEORY.   The Position of Psychology in the System of Knowledge: Hugo Münsterberg 641

---

PLATES.

---

STUDIES IN PERCEPTION.

---

EYE-MOVEMENT AND CENTRAL ANÆSTHESIA.

BY EDWIN B. HOLT.

I. THE PROBLEM OF ANÆSTHESIA DURING EYE-MOVEMENT.

A first suggestion of the possible presence of anæsthesia during eye-movement is given by a very simple observation. All near objects seen from a fairly rapidly moving car appear fused. No further suggestion of their various contour is distinguishable than blurred streaks of color arranged parallel, in a hazy stream which flows rapidly past toward the rear of the train. Whereas if the eye is kept constantly moving from object to object scarcely a suggestion of this blurred appearance can be detected. The