Malster, W. T., 131 Maxim, Sir Hiram, 137 "Merrimac, The," 86 Metacentric height, 8ff Microphone, 198 Mines, 80, 220 Mine-evading submarine, 206, 216ff Mine-laying submarine, 208, 216ff Mirabello, Admiral, 185 "Monitor, The," 86 "Morse, The," French submarine, 191 N Nansen, Capt., 263 "Narval, The," French submarine, 191 "Nautilus, The," 81 Nautilus Submarine Boat Co., 109 Naval Consulting Board, 139, 141ff Nets, used _vs._ submarines, 242ff, 245ff Net-evading submarines, 206, 216ff New Orleans submarine, 39, 152, 153 _New York Herald_, 129, 141 Nordenfelt, 158, 159 O "Obry" gear, 29 Offensive devices, 232 Officina Galileo, 24 Omniscope, 25 One-man submarines, 205 Oscillator, Fessenden, 27, 238 P Paget, Lord, 87 Patent attorneys, 134 Patent laws, 187 Patent "sharks," 134 Payne, Lieut., 38 "Peacemaker, The," 83, 160 Peral, Lieut. Isaac, 160 Periscope, 22ff, 47, 48 Perpetual motion machine, 135, 136 Piratical submarine, 294 Pitt, William, 83 Planté storage battery, 15 "Plongeur, Le," French submarine, 153, 154 "Plunger, The," 166ff, 176, 188ff "Pluviose, The," French submarine, 76 Promoters, 130ff Propelling mechanism, 9ff "Protector, The," 43, 50, 62, 209ff, 235, 260, 262 R "Resurgam, The," 158 Rice, Isaac, 115, 192 Richards, G. M., 98, 99, 102 "Running down," danger of, 42ff Russian experiences, 63ff S Sampson, Admiral, 96, 124 Salvaging, 57, 275 "Schwartzkopf" torpedoes, 247 _Scientific American_, 242 Scott, Sir Percy, 3 Searching for wrecks, 275, 276 Searchlights, 240 Shell-fishing, 285ff Smoke screen, 249 Sound receivers, 27ff Sound detectors, 237ff, 239 Spear, L. Y., 173 Speed, demand for, 11-19 Stability, 7ff, 70, 150 Storage batteries, 9, 15ff Submarine engineering, 287 Submarine guns, 240 Submarine supply boats, 223ff Submarine _vs._ submarine, 244 Sueter, Murray F., 173 Superstructure, 7, 182 T Tillian, Capt., 67 Torpedoes, 28ff, 247 Torpedo tubes, 28 Triangular drag, 165 Trinitrotoluol (T-N-T), 30 Tuck, Josiah L., 83, 84, 160, 295 Turret, armored, 235 U U-1, Austrian submarine, 48 U-2, Austrian submarine, 48 U-boats, German, 3 Under-ice navigation, 260ff Unsinkable ships, 248 V Verne, Jules, 1, 119 Vickers Company, 193 Vision, underwater, 236, 241 W Waddington, 160, 161 "Wake" of a periscope, 233 Ward, Dr. Francis, 266, 267 Washington, George, 150 Weddingen, Lieut., 4 White, Sir William, 192 Whitehead torpedo, 2, 28, 29, 247 Williamson Brothers, 265ff Williamson, Capt. Charles, 265 Wireless, 28, 198 Wrecking work, 57 Wright Brothers, 137 Z Zalinski, Capt., 109 Zigzag course, 250 FOOTNOTES: [1] Probably "The Intelligent Whale." [2] NOTE.--The blockade of Alexandria was in progress at that time.