[Figure 87] is a simple primary mass without enrichment. It is comparable to the plain box-like structure with monotonous outline and without interest. The eye follows the outline in the direction of the arrows, pausing at the square corners, which interrupt a free movement by a harsh right angle. The base (an appendage) repeats in each instance the lines of the primary mass.
[Figure 88]. Round corners, by freeing the design from the right angles, accelerate the eye movement and give a sense of added interest and grace to the contour.
[Figure 89]. The cornice of a building suggests a similar arrangement which may be added to the primary mass. It adds the element of contrast of direction and variety of widths.
Variations
[Figure 90]. The main primary mass of a building with two equal appendages will suggest the enrichment of the outline in sympathy with three vertical divisions. Rule 3b. The rounded corners again assist the eye to travel freely around the contours, thus giving a sense of unity to the entire form.
Plate 22
