1 PREFACE.
7 CHAPTER 6. FLEEMING JENKIN.
2 CHAPTER 1. THE ORIGIN OF THE TELEGRAPH.
8 CHAPTER 7. JOHANN PHILIPP REIS.
3 CHAPTER 2. CHARLES WHEATSTONE.
9 CHAPTER 8. GRAHAM BELL.
4 CHAPTER 3. SAMUEL MORSE.
10 CHAPTER 9. THOMAS ALVA EDISON.
5 CHAPTER 4. SIR WILLIAM THOMSON.
11 CHAPTER 10. DAVID EDWIN HUGHES.