“The Logical Spectrum.” In Philosophical Magazine, Volume 19, 1885, p. 286.
Library stamps and bookplates. Otherwise very good. Complete volume, in green cloth. In the years following Venn’s announcement of his diagrams (Philosophical Magazine, 1880) it became clear that, although they offer graphical vividness, the diagrams suffer from an inherent limitation; at most five variables can be represented by intersecting continuous.....