| CHAPTER | PAGE | |
| I | In the Beginning | 3 |
| II | David Bushnell’s “Turtle” | 12 |
| III | Robert Fulton’s “Nautilus” | 26 |
| IV | Submarines in the Civil War | 36 |
| V | The Whitehead Torpedo | 43 |
| VI | Freaks and Failures | 56 |
| VII | John P. Holland | 69 |
| VIII | The Lake Submarines | 82 |
| IX | A Trip in a Modern Submarine | 100 |
| X | Accidents and Safety Devices | 124 |
| XI | Mines | 139 |
| XII | The Submarine in Action | 156 |
| XIII | The Submarine Blockade | 177 |
| XIV | The Submarine and Neutrals | 189 |
| Index | 207 |