Diagram Systems Diagrammatic Thinking and Its Expression Eiichi Izuhara, Takeo Yoshida, Hiroaki Atsumi Nikkan Kogyo Shimbun, Ltd. A5 size, hardcover, 252 pages This book explains how to convert complex information and thought processes into the visual language of "diagrams" and effectively utilize them as "tools for thinking." It explores, classifies, and systematizes a vast array of diagrammatic expressions from ancient and modern times, including Babylonian clay tablets, ancient Egyptian star charts, Aristotle's anatomical diagrams, ancient Chinese Yin-Yang Bagua diagrams, Ptolemy's world map, medieval Christian hymn scores, the mandala of To-ji Temple in Kyoto, the floor plan of Katsura Imperial Villa, Copernicus's celestial sphere diagrams, Descartes' coordinate geometry, Newton's diagram of sunlight refraction, Playfair's statistical graphs, Darwin's phylogenetic tree, Mendeleev's periodic table of elements, Le Corbusier's Modulor, Neurath's ISOTYPE, Alexander's Pattern Language, and Kohei Sugiura's time-axis globe. It presents a practical methodology for "diagrammatic thinking." This is an old book from 1986. There are pencil markings on about 7 pages. They will probably erase, but they have been left as is. There is some yellowing on the top, but the paper inside is very clean. Please check the photos for details.