We thus return to the simple line.  I have considered a series of judgments on it, and a series on two different figures, varying in the degree of complexity presented, in one of their fillings.  It remains very briefly to see if the introspection on the simple line furnishes further warrant for carrying the complexities over into the simple line and so giving additional validity to the outlined theory of substitution.  The following phrases are from introspective notes.

A.  Sweep wanted over long part.  More attention to short.  Significance of whole in short.  Certainly a concentration of interest in the short.  Short is efficacious.  Long means rest; short is the center of things.  Long, an effortless activity; short, a more strenuous activity.  When complex fillings are introduced, subject is helped out; does not have to put so much into the short division.  In simple line, subject introduces the concentration.  In complex figures the concentration is objectified.  In equal division subject has little to do with it; the unequal depends on the subject—­it calls for appreciation.  Center of references is the division point, and the eye movements to right and left begin here, and here return.  The line centers there.  The balance is a horizontal affair.

B.  Center a more reposing division.  Chief attention to division point, with side excursions to right and left, when refreshment of perception is needed.  The balance is horizontal and not vertical.

C.  A balance with variety, or without symmetry.  Centers at division point and wants sweep over long part.  More concentration on short part.  Subjective activity there—­an introduction of energy.  A contraction of the muscles used in active attention.  Long side easier, takes care of itself, self-poised.  Line centers at division point.  Active with short division.  Introduces activity, which is equivalent to the filling that the complex figures have; in these the introduced activity is objectified—­made graphic.

D.  Focal point at division point:  wants the interesting things in a picture to occupy the left (when short division is also on left).  Short division the more interesting and means greater complication.  When the pleasing division is made, eyes move first over long and then over short.  Division point the center of real reference from which movements are made.

E.  No reference to center in making judgments; hurries over center.  All portions of simple line of equal interest; but in unequal division the short gets a non-apparent importance, for the line is then a scheme for the representation of materials of different interest values.  When the division is too short, the imagination refuses to give it the proportionally greater importance that it would demand.  When too long it is too near equality.  In enjoying line, the division point is fixed, with shifts of attention from side to side.  An underlying intellectual assignment of more value to short side, and then the sense-pleasure comes; the two sides have then an equality.