Morse apparatus and alphabet - Public domain book illustration

Print shows apparatus for sending and receiving coded telegraph messages, with the alphabet and numbers in "Morse code."

Illus. in: Knight's American mechanical dictionary. New York : Hurd and Houghton, 1877, vol. 2, fig. 3225.
Published in: The tradition of technology : Landmarks of Western technology ... / Leonard C. Bruno. Washington, D.C. : Library of Congress, 1995, p. 237.