(Rotations-Apparat nach Marbe)
Description: This is another type of rotational apparatus used
to demonstrate the principles of color mixing.
The disks are counter-rotating, and adjustable (for the sectors
on the above disks) while they are turning. Because of the rapid
setup, it can be used for research work (doubtful) and
demonstrations of color complementarity and the production of
color equations. The apparatus was apparently still in use in
Germany in the 1950s. (Expanded caption Copyright 1998, Edward J.
Haupt)
(Source:Karl Marbe, at the time of publication, Second Chair
(2. Vorstand) of the University of Würzburg
Psychological Institute, not otherwise noted.)
Source of illustration: Zimmermann, E. (1903). XVIII. Preis-
Liste über psychologische und physiologische Apparate
(p. 5). Leipzig: Eduard Zimmermann.
DESCRIPTORS:
Type: demonstration
Stimulus: colored, gray, or patterned disks
System: vision
Output: N/A