even in a glance. Now if you examine this picture more in detail you will find much continuity of line and many parallelisms of line and shape, all of which tend to make the arrangement simple, without reducing any of the actual contents of the picture.
The "much" which we can see in a beautiful line includes such things as its meaning or use in the picture, its fitness for that use, its power to suggest associations, its interestingness, etc. But we shall not take up those phases of beauty in this chapter; we are now merely arguing that pictorial beauty economizes the work of the eye and brain, while visible ugliness does not.
What we said, a moment ago, regarding the value of continuity and repetition in fixed lines may also be applied to moving lines and objects. The great appeal of the screen lies in the showing of vivid movement, the flow of forms, the subtle weaving, through soft play of light and shadow, of fanciful figures that melt like music while we gaze, and yet remain in our minds like curves of a strange melody. When such glimpses of beauty come, our eyes and brains surely do not feel any friction or strain in the process of looking. But when ugly motions are presented the eye must perform excessive movement, and the brain must exert excessive effort.
What is an ugly motion? To answer this we must observe one or two facts concerning the visual process of seeing motions. We must admit the fact that one can perceive the motion of an object without following it with the eyes. Any one can test this for himself by fixing his eyes steadily on some spot on the wall. Without shifting his glance he may have knowledge
