Book excerpt: The author, who died in 1993, was an architect, industrial designer and craftsman. In this book, he explores the meaning of skill and its relationship to design and manufacture. He proposes a new theory of making based on the concepts of "workmanship of risk" and "workmanship of certainty" and shows how good workmanship imparts diversity to the visual environment. Includes photographs of the author's own turned and carved vessels of wood.