CHAPTER XXIII.
1836--1837 First exhibitions of the Telegraph .-- Testimony of Robert G.Rankin and Rev.Henry B.Tappan .-- Cooke and Wheatstone .-- Joseph Henry, Leonard D.
Gale, and Alfred Vail .-- Professor Gale's testimony .-- Professor Henry's discoveries .-- Regrettable controversy of later years .-- Professor Charles T.Jackson's claims .-- Alfred Vail .-- Contract of September 23, 1837 .-- Work at Morristown, New Jersey .-- The "Morse Alphabet."-- Reading by sound .-- First and second forms of alphabet.