14 ILLUSTRATIONS 



FIG. FAfiK 



27. The simplest reflex arc in the spinal cord 112 



28. Orbital muscles 126 



29. Section through the anterior portion of the eye .... 127 



30. Formation of image on retina 129 



31. Errors in refraction 132 



32. Tympanum of right side with the auditory ossicles in place 134 



33. Semidiagrammatic section through the right ear .... 136 



34. Diagrammatic view of the organ of Corti ...... 136 



