Champion, S. T., 127 Champion, B. F., 128 Churchill, Winston, 217 Classes of submarine, 206 Coast defense submarines, 197 Compass, adjustment of, 180, 181 Compressed air engine, 10 "Congress, The," 87 Conning tower (invisible), 26 Converse, G. A., 162 Convoy, 249 Criticisms of submarine, 290ff Cruiser submarines, 199ff "Cumberland, The," 87 D Dangers of submarining, 32ff Daniels, Josephus, 139 Dawson, Sir Trevor, 174 Day, 79 Debrell, Cornelius, 77, 78 Deck guns, 239 Decompression, question of, 278 Defensive devices, 232 "Delphine," Russian submarine, 65, 66 Depth control, 17ff, 216 Destiny of submarine, 296, 297 Detection of surface ships, 257 "Deutschland, The," 251 Dickey, 91 Diesel engines, 13ff Dirigibles, 234ff Discs, whirling, 248 Divers, 59, 276, 277ff Divers' compartment, 30, 51ff, 221 Dixon, Lieut., 39 Doyle, A. Conan, 4 Dunkerly, 91 "Dzrewiecke apparatus," 192 E E-2, American submarine, 76 "Eagle, The," 79, 80, 150 Echo device, 241 Edison, Thos. A., 16, 141 Electric Boat Company, 114 Engines, 9ff Engines, difficulty with, 11ff, 292, 293 "Even-keel," 173ff, 183 Exius, Otto, 140 Explosions, 70ff F F-1, American submarine, 76 F-4, American submarine, 76 "Farfadet," French submarine, 76 Fenian movement, 96, 157, 158 "Fenian Ram," 96ff, 157, 158 Fessenden, Prof., 27, 238 Fisher, J. J., 56 Fleet submarines, 199ff "Foca, The," 13 Folger, Commander, 162 "Fortuna," 63 Freight submarine, 58 "Fulton," American submarine, 76 Fulton, Robert, 81, 151, 294, 295 G Gadd, Capt. Alex., 44 Garrett, G. W., 158 Geological investigation (submarine), 264 Goubet, M., 160 Government aid to inventors, 138ff Grubb, Sir Howard, 25 "Gustave Zédé," French submarine, 162 "Gymnote," French submarine, 162 Gyroscope, 29 H Hale, Senator, 125 Halstead, O. S., 155 Hanson, Capt. Scott, 263 Hasker, C. H., 38, 152 Haswell, C. H., 126 Holland, J. P., 84ff, 157, 163, 295 Holland, J. P., Jr., 85 "Holland, The," American submarine, 190, 191 Hopkinson, Francis, 81 "Housatonic," S. S., 39 Hull, construction of, 6, 7 "Hunley, The," 37, 38, 152, 158 Hydrogen, 16 Hydrographic investigation, 269ff Hydroplanes, 17, 171ff I "Intelligent Whale, The," 155ff Internal combustion engines, 10 International peace, influence of submarines, 295 Installation of batteries, 16 Inventors, proposed institution for, 146ff "Irish Ram." See "Fenian Ram." J Jonson, Ben, 77 K Koenig, Capt. Paul, 251 Krupps, 183, 184 L Lake, 1893 design, 169ff Lauboeuf, M., 2, 173, 183 Laurenti, naval constructor, 183, 186 Lees, Capt. Edgar, 174 Legitimacy of the submarine, 294 Limitations of the submarine, 290ff Lister, John, 91 "Lutine, The," 76 M Magnetic devices, 247ff