Color disk rotator

(Rotations-Apparat für Farbscheiben)
Description: This hand-held apparatus was used to rotate stimulus disks with differing proportions of two or more colors to demonstrate the principles of color mixing. Disks which demonstrate other color and lightness phenomena, such as Mach bands are included in the catalog (see Fig. 13). Examples of disks /A> could also be used. (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. 2). Leipzig: Eduard Zimmermann.

DESCRIPTORS:
Type: demonstration
Stimulus: colored, gray or patterned disks
System: vision
Output: N/A

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