A theory of pure design — Inside the Classic

Harmony of Shape and Measure

Ross distinguishes between Shape-Harmony and Measure-Harmony, treating them as independent variables. In Fig. 202, he presents outlines-within-outlines that share shape but differ in measure, yielding Shape-Harmony without Measure-Harmony. Similarly, Fig. 203 shows concentric outlines of identical shape but different sizes, again lacking Measure-Harmony. Ross notes that such arrangements also involve a Harmony of Attitudes but no Harmony of Intervals. This analytical separation allows him to isolate how each formal element contributes to the overall design. He emphasizes that when outlines have different shapes and measures—especially irregular ones—the composition becomes more difficult, requiring careful grouping to achieve order. The excerpts show Ross’s methodical cataloging of possibilities: alternation of attitudes, alternation of shape-character, and the effects of contacts and interlacings.

Balance, Movement, and Rhythm

Ross treats balance as a dynamic phenomenon tied to movement. In concentric repetitions (Fig. 204), movements converge toward the center, enhancing balance; eccentric repetitions (Fig. 207) produce a lack of balance and a clear directional movement, which he describes as “up-to-the-left, unmistakably.” He argues that when such eccentric compositions are repeated at regular intervals, the movement becomes rhythmical. Ross also examines axial and symmetrical balance: Fig. 209 shows contacts with Harmony of Attitudes and symmetrical balance on a vertical axis, while Fig. 210 presents contacts without Harmony of Attitudes yet still achieving central and axial symmetry. The concept of rhythm emerges from regular, measurable movement—whether in a single composition or through repetition. Ross’s language is precise: he speaks of “convergences,” “crowding together of attractions,” and “regular in its measures” to ground aesthetic effects in quantifiable terms.

The Role of Diagrams and Technical Process

Ross’s reliance on numbered figures (Figs. 199–212) is central to his method. He uses diagrams not merely as illustrations but as evidence for his claims, inviting readers to verify visual relationships. For instance, Fig. 206 demonstrates alternation of shape-character, while Fig. 211 introduces interlacings. Ross acknowledges that understanding may “lie in technical processes and in visual images” rather than words, yet he insists on verbal formulation for general comprehension. The excerpts show him working through experiments: “A lot of experiments have to be tried, to find out what connections, what arrangements…” This iterative, empirical tone aligns with his stated goal of contributing to science. The diagrams serve as a bridge between abstract principles and concrete perception, reinforcing his argument that design can be systematically taught and learned.

Readers approaching A Theory of Pure Design should expect a rigorous, almost mathematical treatment of visual composition. Ross’s terminology—shape, measure, attitude, interval—forms a consistent vocabulary that rewards careful attention. The diagrams are not optional; they are integral to the argument. While the book does not claim to teach artistic genius, it offers a framework for understanding the formal decisions that underlie any work of art. For those interested in the intersection of art and science, or in the history of design theory, this text provides a clear, systematic foundation.

I keep returning to A Theory of Pure Design for its quiet faith in measurable order, Ross’s diagrams like handwriting from a calmer age. It makes me think of Naturalistic Photography for Students of the Art. — Themes and Context, which similarly pursued a kind of honesty in seeing. Both feel like letters from someone who believed attention could be taught.