Visual illusions, their causes, characteristics and applications (1922)
Luckiesh, Matthew, b. 1883 · New York, D. Van Nostrand company · leaf 82
EQUIVOCAL FIGURES 67 circles each. Perhaps we may be momentarily con- scious of individual circles; then the pattern may change to a hexagonal one, each '* hexagon" con- sisting of seven circles — six surroxmding a central one. The pattern also changes into parallel strings of circles, triangles,… … Fig. 29. — Crossed lines which may be interpreted in two ways. The crossed lines in Fig. 29 can be seen as right angles in perspective with two different spatial ar- rangements of one or both lines. In fact there is quite a tendency to see such crossed lines as right angles in perspective. The two…
Optical illusions
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
