observations, that the scope of the focus of attention and the region of clearest vision in the physiological sense differ widely from each other. The latter, under the conditions of observation we have chosen, comprises a far wider field than the former. In our figure there are 95 letters: If it were possible simultaneously clearly to perceive in the psychological sense all the objects clearly seen physiologically, then we should be able by fixating the point _o_ to perceive all these letters. This is, however, by no means the case. At one given moment we can differentiate only a few, which surround the fixation-point of attention, whether this coincides with the objective fixation-point of the field of vision, as in ordinary vision, or whether it lies in any way outside of this point owing to a severance of the two fixation-points. Although these observations as to the simultaneous recognition of haphazardly arranged simple objects, e.g. letters, point decisively to a fairly narrow limitation of the scope of attention, still we cannot give an exact numerical answer by this method as to the size of this scope, as we could by means of our metronome experiments in regard to the scope of consciousness. Still, without any great change and without any complicated apparatus, we can make these visual experiments suffice to answer our question. Our immediate results will, of course, only be valid under the special conditions we set up. For this purpose a great number of such diagrams, with letters arranged in the same manner, must be constructed. The position of the letters in each diagram must be different. Then a fairly large square of white cardboard, with a black point in the middle, is made (as in the figure on p. 19). With this we cover the diagram chosen for the experiment. The observer, who previously must not have seen the diagrams, is told to fixate with one eye the point in the middle, and to keep the other eye closed.