The telegraph in American and Morse memorial (1886)
Reid, James D · New York, Printed for the author by J. Polhemus · leaf 925
y the other, the tune played at the dis-tant station or other end of the line, became distinctly audible. Thefaster the cylinder was revolved the louder were the sounds. The telephone is the outgrowth of these and kindred experiments.Other minds were at work in the same direction. It appears to… … -»Hh- The American Speaking Telephone Company. 847 I
Morse, Samuel Finley Breese, 1791-1872 · Telegraph
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
