(Tauschungsfiguren.)
Description: Figures made from a heavy brass wire and painted
black. The tips which reveal the illusions are attached with
hinges so that the illusion-producing corners can be moved back
and forth between the two positions. (Expanded caption Copyright
1998, Edward J. Haupt)
(Source: None given.)
Source of illustration: Zimmermann, E. (1903). XVIII. Preis-
Liste über psychologische und physiologische Apparate
(p. 120). Leipzig: Eduard Zimmermann.
DESCRIPTORS:
Type: Stimulus
Stimulus:
System: Visual illusions
Output: