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12 St 1 Jan 1931 Jahr - Ophthalmograph and Metronoscope Devices

Beschreibung:

Earl, James, and Carl Taylor created the Ophthalmograph and Metronoscope, devices used to record the movement of eyes while reading and tools that trained people to read more effectively.

Zugefügt zum Band der Zeit:

Datum:

12 St 1 Jan 1931 Jahr
Jetzt
~ 94 years ago