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12 h 1 jan 1931 ano - Ophthalmograph and Metronoscope Devices

Descrição:

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.

Adicionado na linha do tempo:

Data:

12 h 1 jan 1931 ano
Agora
~ 94 years ago