The hands of a blind boy using braille to do his mathematics homework. Developed by Louis Braille in 1837,each letter of the Braille alphabet is represented by a system of raised dots,which are read by touch | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / McIntyre, Will & Deni |
Bildgröße: | 3331 px × 4813 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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