(Registriertrommel.)
DESCRIPTORS:
Description: This one, in contrast to No. 243
A separate drum/A> can be used horizontally or vertically
(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. 76). Leipzig: Eduard Zimmermann.
Type: Component
Stimulus: N/A
System: N/A
Output: N/A