(_A_) _Zone of Enrichment_: In the margin.
_Reason for Choice_: Central area to be devoted to zone of service requiring simplicity in design.
[Sidenote: Marginal Enrichment]
_Type of Design_: Bands or borders.
_Inceptive Axis_: For corners; the bisector of the angle.
_Points of Concentration_: The corners and, if desired, at equal intervals between the corners.
_Ill.u.s.trations_: Figures 283, 284, 286, 287, 288.
(_B_) _Zone of Enrichment_: center of surface, free ornament.
[Sidenote: Center Enrichment]
_Type of Design_: Initials, monograms, street numbers, geometric patterns, and other examples for free ornament. A star or diamond is _not_ appropriate enrichment for a square area unless properly related to the contour by connecting areas.
_Inceptive Axes_: Vertical or horizontal diameters or diagonals.
_Points of Concentration_: Center of embellishment.
_Ill.u.s.trations_: Figure 285.
[Ill.u.s.tration: SURFACE ENRICHMENT OF CLAY
HIGH CYLINDRICAL FORMS. VASES, PITCHERS, ETC
PLATE 50]
(_C_) _Zone of Enrichment_: full surface enrichment in a horizontal position.
_Type of Design_: A symmetrical pattern generally radiating from the geometric center of the surface and covering at least two-thirds of the surface.
[Sidenote: Full Vertical Surface Enrichment]
_Inceptive Axes_: Diameters or diagonals of the area.
_Points of Concentration_: At the corners or the center of the outer margin; at geometric center, as in a rosette.
_Ill.u.s.trations_: Figures 283, 289, and 291.
[Sidenote: Full Horizontal Surface Enrichment]
(_D_) _Zone of Enrichment_: full surface enrichment in a vertical position.
_Type of Design_: A symmetrical pattern with a strong upward movement and covering more than one-half of the surface.
_Inceptive Axis_: The vertical center line.
_Point of Concentration_: Upper section of the surface.
_Ill.u.s.trations_: Figures 290 and 292.
[Sidenote: Free Balance]
(_E_) _Zone of Enrichment_: free balance over full surface.
_Type of Design_: Semi-decorative motive preferably covering the entire surface.
_Inceptive Axis_: Ma.s.ses freely balanced over the geometric center of the area.
_Point of Concentration_: Near, but not in the exact center.
_Ill.u.s.trations_: Figures 293, 294, 295, 296, 297, 298.
_Note_: The points of concentration should be accented by slight contrast of value and hue. See chapters on color.
[Sidenote: Shallow Circular Forms, Plate 48]
_Problems_: Plates, saucers, ash trays, card receivers, almond and candy bowls.
(_A_) _Zone of Enrichment_: margin of interior surface; margin of exterior surface.
_Type of Design_: Bands or borders thoroughly related to the structural contours. Bands for exterior enrichment may be placed directly on the contour, Figures 299 and 301, thus forming an
[Ill.u.s.tration: APPLIED AND CONSTRUCTIVE DESIGN
RULE 9: ENRICHMENT OF THE PRIMARY Ma.s.s BY A BORDER
PROBLEM: ENRICHMENT OF CLa.s.s 2 (POTTERY)
PLATE 51.--Instruction Sheet]
[Sidenote: Marginal Enrichment]