| PAGE |
| U. S. Submarine M-1 | Frontispiece |
| Cornelius Van Drebel | 5 |
| The Rotterdam Boat | 8 |
| Symons’s Submarine | 10 |
| The Submarine of 1776 | 13 |
| The Best-known Picture of Bushnell’s Turtle | 16 |
| Another Idea of Bushnell’s Turtle | 19 |
| Ezra Lee | 21 |
| The Nautilus Invented by Robert Fulton | 28 |
| Destruction of the Dorothea | 33 |
| Views of a Confederate David | 37 |
| C.S.S. Hundley | 38 |
| Cross-section of a Whitehead Torpedo | 51 |
| Davis Gun-torpedo After Discharge, Showing Eight-inch Gun Forward of Air-flask | 53 |
| Effect of Davis Gun-torpedo on a Specially-constructed Target | 54 |
| The Intelligent Whale | 58 |
| Le Plongeur | 59 |
| Steam Submarine Nordenfeldt II, at Constantinople, 1887 | 62 |
| Bauer’s Submarine Concert, Cronstadt Harbor, 1855 | 65 |
| Apostoloff’s Proposed Submarine | 67 |
| The Holland No. 1 | 70 |
| The Fenian Ram | 73 |
| U.S.S. Holland, in Drydock with the Russian Battleship Retvizan | 77 |
| John P. Holland | 80 |
| Lake 1893 Design as Submitted to the U.S. Navy Department | 83 |
| The Argonaut Junior | 84 |
| Argonaut as Originally Built | 87 |
| Argonaut as Rebuilt | 90 |
| The Rebuilt Argonaut, Showing Pipe-masts and Ship-shaped Superstructure | 93 |
| Cross-section of Diving-compartment on a Lake Submarine | 94 |
| Cross-section of the Protector | 97 |
| Mr. Simon Lake | 98 |
| U. S. Submarine E-2 | 101 |
| A Submarine Cruiser, or Fleet Submarine (Lake Type) | 105 |
| Auxiliary Switchboard and Electric Cook-stove, in a U.S. Submarine | 107 |
| Forward Deck of a U. S. Submarine, in Cruising Trim | 109 |
| Same, Preparing to Submerge | 110 |
| Depth-control Station, U. S. Submarine | 113 |
| Cross-section of a Periscope | 114 |
| Forward Torpedo-compartment, U.S. Submarine | 117 |
| Fessenden Oscillator Outside the Hull of a Ship | 120 |
| Professor Fessenden Receiving a Message Sent Through Several Miles of Sea-water by His “Oscillator” | 121 |
| Side-elevation of a Modern Submarine |
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