Intervallapparatus according to Anton Appunn, Hanau
24 x 52 x 26 cm (h x w x d)
3D-Animation Intervallaparatus

The company Anton Appunn from Hanau near Frankfurt built interval apparatuses for Carl Stumpf's experiments. Together with Appunn, Stumpf conducted sound analyses on the organ as well as psychoacoustic investigations. Later, other companies also offered such acoustic devices.
The Appunn company also built instruments for Hermann von Helmholtz.

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Heinz Alfred Müller (1930-1990)
150 x 100 x 2.5 cm (h x w x d)
The Center for the History of Psychology presents:
Külpe's request July 17, 1895
150 x 150 cm (h x w)
The Center for the History of Psychology presents:
Arnold on the balance between theory and practice, 1956
150 x 170 x 2.5 cm (h x w x d)
The Center for the History of Psychology presents:
Wilhelm Janke (1935-2011)
150 x 100 x 2 cm (h x w x d)
The Center for the History of Psychology presents:
Otto Heller and his "Anton"
100 x 150 x 2.5 cm (h x w x d)
The Center for the History of Psychology presents: