View source for Night writing

'''Night writing''', aka '''sonography''', was a system of [[code]] that used symbols of twelve dots arranged as two columns of six dots embossed on a square of paperboard, and is now remembered as the forerunner of [[Braille]].

== Description ==

It was designed by [[Charles Barbier]] in response to [[Napoleon']]s demand for a code that soldiers could use to communicate silently and without light at night.

Called sonography, each grid of dots stands for a [[character]] or [[phoneme]].

Barbier's system was related to the [[Polybius square]], in which a two-digit code represents a character.

In Barbier's variant, a 6×6 matrix includes most of the characters of the French alphabet, as well as several digraphs and trigraphs.

== See also ==

* [[Charles Barbier]]
* [[Polybius square]]

== External links ==

* [https://en.wikipedia.org/wiki/Night_writing Night writing] @ Wikipedia



[[Category:Writing systems]]