In 1838 he transmitted 10 words a minute over the telegraph using his new code
In 1838, at an exhibition of his telegraph 
in New York, Morse transmitted ten words per minute using the Morse code that 
would... [DOC] [TLE] History of Morse : nrich.maths.org [PAR] Then, in 1838, Samuel Morse and his assistant, Alfred Vail, demonstrated an 
even ... telegraph device which sent messages using a special code - Morse 
code.