138 + 90 pages of illustrations Reprint of the 1940 ed. Considered to be the work of Leonardo when it was acquired by Constantine Huygens in 1690, this illustrated manuscript does not in fact contain a single original drawing by Leonardo da Vinci. Its authorship still in question, this mid sixteenth-century work has been attributed to, among others, Aurelio Luini, Girolamo Figino, and Carlo Urbino. Contents include: The history of the manuscript -- The content of the manuscript -- The first book or "regola": form and structure of the human body -- The second book or "regola": theory of human movements -- The third book or "regola": transformation, i.e., parallel projection -- The fourth book or "regola: theory of proportions -- Norms of human proportions -- Variations of human proportions -- Geometrical construction of female figures -- Copies and tracings after Leonardo da Vinci -- Studies in human proportions -- Studies in the proportions of the horse -- The fifth book or "regola": perspective -- General introduction, theory of light and shade, and "lineamenti" -- Rules of perspective applied to human figures in normal view -- Rules of perspective applied to human figures in worm's eye view -- Rules of perspective applied to human figures in bird's eye view -- The author and his sources.