Antique turn of the century Gravity Tachistoscope; large wooden apparatus with rectangle aperture.

Gravity Tachistoscope is a device used in psychological experiments to present visual stimuli for very brief durations. It operates on the principle of gravity, allowing controlled exposure of images or text to participants. The Tachistoscope is commonly used to study visual perception, attention, and memory by presenting stimuli for specific durations and measuring participants' responses.

Measures 30 1/2" x 12" x 9"

antique medical, antique psychology, antique science

Some signs of wear and use consistent with age.

In house domestic shipping $30.