Lithograph Wall Chart] Structural Differential

New York: Rand McNally & Co., 1949. Book. Near Fine. No Binding. First Printing. 18"w x 38"h. RARE lithograph wall chart for the device called the "Structural Differential" which Alfred Korzybski patented in 1925 as a means to aid in visualizing the process he called "abstracting". This was to be used as a training device in general semantics, a field of study Korzybski is credited with founding. The chart is Near Fine, rubbed lower right, mounted on two stained wooden dowels with ribbon hanger 18" wide by 38" high. Korzybski's work in semantics heavily influenced science fiction authors such as A.E. Van Vogt, Robert A. Heinlein, Poul Anderson, and H. Beam Piper, as well as L. Ron Hubbard and Joseph W. Campbell. His most famous quote "The map is not the territory" comes from this longer quote "A map is not the territory it represents, but, if correct, it has a similar structure to the territory, which accounts for its usefulness."( Science and Sanity, Korzybski, 1931). OCLC locates no copies; no sales records at RBH..