How did people use a telegraph to communicate without speech?
a. with a series of bells of varying pitches
b. with words typed out on a typewriter
c. with morse code
d. with overland mail carriages?
How did people use a telegraph to communicate without speech?
a. with a series of bells of varying pitches
b. with words typed out on a typewriter
c. with morse code
d. with overland mail carriages?