Masters of Space / Morse and the Telegraph; Thompson and the Cable; Bell and the Telephone; Marconi and the Wireless Telegraph; Carty and the Wireless Telephone

by Walter Kellogg Towers

S

Sanders, Thomas, 148, 159, 178.
Scribner, Charles E., 236.
Searchlight telephone, 251.
Semaphore signals, 27.
Shouting sentinels, 16.
Sibley, Hiram, 96, 99.
Signal columns, 19.
Siphon recorder, 137.
Smith, Francis O.J., 76.
Stentorophonic tube, 18.
Submarine signals, 31.