type-and-rule

Updated: May 24, 2025

Already the type-and-rule and all the symbols and dictionaries had been discarded, and the dot-and-dash alphabet was substituted. On April 23d, 1844, Vail substituted the earth for the metallic circuit as an experiment, and that great step both in knowledge and in practice was taken. Within an incredibly brief space the Morse Electric Telegraph had spread all over the world.

James W. Steele - Steam, Steel and Electricity