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12 ч 1 янв 1931 г. - Ophthalmograph and Metronoscope Devices

Описание:

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.

Добавлено на ленту времени:

Дата:

12 ч 1 янв 1931 г.
Сейчас
~ 94 г назад