1. The uncurtained window space is more or less diamond shaped. 2. The four sections of the curtains are almost exactly alike. Others will choose B, and give such reasons as follows: 1. The window space is less noticeable. 2. There is more variety in the curtains. 3. It is more interesting if the eye can travel down the longer part of the curtain and then come to rest at the part tied back. These reasons will probably lead the majority of the class to decide that B is more desirable than A. At this time another arrangement designated as C may be introduced. For this, one curtain at the second window may now be tied back so near the sill that the two parts do not seem to be related. One designated as D may also be introduced, in which the arrangement is exactly like that of B, except that the curtains are tied back above the center instead of below. A summary of the points which may be brought out by the class on each arrangement of curtains follows: [Sidenote: Summary of class discussion] A, in which the curtains are divided exactly in half, is not interesting for a very long time because-- 1. The divisions on each side as well as above and below the tie backs are all alike. 2. It leaves too much of the window exposed. 3. The window space exposed does not follow the lines of the window. 4. The arrangement becomes tiresome the longer one looks at it. 5. One's curiosity is quickly satisfied when it is obvious that the two areas are exactly alike. B, in which the curtains are tied back between one-half and two-thirds of the length and below the center continues to be interesting because-- 1. The two sides are alike, but the top half is not exactly like the bottom half. This variation makes it more pleasing. 2. Although the top half of each side is larger than the bottom half, it does not look top-heavy because the tying back of the curtain gives a place for the eye to rest. It holds the same amount of attention as the long length of curtain above it. C, in which the tie backs are placed at a point below three-quarters the length of the curtain, is not interesting for any length of time because-- 1. The eye travels very far down the length of the window, then is suddenly interrupted by the tie back. 2. This arrangement is top-heavy. 3. The window space is not pleasing. D is exactly the reverse of B, so it is equally interesting. [Sidenote: Further use of illustrative material] "Suppose we now look at these curtained windows from the outside. Do you think that the arrangements which we decided are most pleasing from the inside are equally pleasing from the outside?"