English: A comparison of three methods of printing for the blind in the nineteenth century. "A" and "Z" are printed in the embossed lettering favored by Valentin Haüy; in the "night writing" military code of Charles Barbier; and the modern English version of braille code by Louis Braille.
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{{Information |Description ={{en|1=A comparison of three methods of printing for the blind: "A" and "Z" are printed in the embossed lettering favored by Valentin Haüy; in the "night writing" military code of Charles Barbier; and the modern English...