Wilhelm Ostwald (1853-1932) was a German chemist and Nobel Prize winner. He was one of the natural scientists who dedicated himself to the fundamentals of visual design and strongly influenced the protagonists of modernism. Ostwald developed a fundamental theory of colors and the harmony of forms. His work Harmony of Forms, in which he systematically examines the laws of harmonious forms, is based on the credo Lawfulness equals harmony—a theorem of old master builders—and a thought by Goethe: "And only the law can give us freedom.” The structure of this new edition of Harmony of forms corresponds to that of the 1924 edition. The book is divided into eight chapters: Spatial Harmony, Lines, Lichens, Bands, Unlimited Surfaces, Limited Surfaces, Pictorial Art, and Body Forms. Wilhelm Ostwald's explanations are supported by 106 illustrations in the text. The Klang MT font is used for the headings. Its handcrafted, calligraphic formal language is reminiscent of the aesthetics of the turn of the century. The markup colour red also creates a historical reference. URW Grotesk is used for the body text, its dark typeface reflecting the constructivist momentum of the time. Overall, the design experiments with a historicizing, bourgeois look, which is broken up again by the constructed type area and the large white space. The systematically constructed patterns for the chapter dividers are based on the combination of various regularities that Ostwald demonstrates in the book.