Louisa S. Cook, Geometrical Psychology or the Science of Representation: an Abstract of the Theories and Diagrams of B. W. Betts, George Redway, 1887


Figure 16 is an ordinary elevation of an Ond Corolla in orthographic instead of isometrical projection. It shows very clearly the coil of undeterminateness, which is coloured red, winding through the form, and the spiral lines of experience or memory encircling the form of the consciousness. These lines could not well be drawn in the Corolla digrams of the other kind of projection.