Question

n.
Louis Braille evolved a system in which one letter was distinguished from another by
Louis Braille looked​

Answer 1

Answer:

When Louis Braille entered the school for the blind in Paris, in 1819, he learned of a system of tangible writing using dots, invented in 1819 by Capt. Charles Barbier, a French army officer. It was called night writing and was intended for night-time battlefield communications.