On Page 7 (line 11) insert words "could be destroyed" after "anchor." On Page 284, (Middle of page) "Fig. 176" should be "Fig. 168." On Page 285 (4th line from bottom) "e" should be "d." INDEX. A. Abel, experiments by Professor, 207 Abel's detonation experiments, 216 ---- high tension fuzes, 37 ---- mechanical primer, 23 Action, chemical, 269 ---- ----, in a Daniell cell, 274 ---- ---- single fluid cell, 273 Adjustments of Whitehead's fish torpedo, the, 136 Admiral Porter's torpedo ship _Alarm_, 159 ---- ----, the armament of, 160 Adoption of the fish torpedo, the invention and, 131 Advantages of electrical submarine mines, the, 28 ---- ---- mechanical mines, the, 17 Agents, torpedo explosive, 217 Air pump, the, 260 _Alarm_, Admiral Porter's torpedo ship, 159 _Albemarle_, destruction of the, 191 Aluta, the Russian torpedo boat attack off the, 200 American Civil War, the, 189 ---- ----, mechanical mines in the, 16 ---- ----, torpedoes during the, 115 ---- ----, submarine mines during the, 27 ---- extempore drifting torpedoes, 119 Apparatus, directions for using the diving, 261 ----, firing keys and shutter, 80 ----, Siemens' electric light, 241 ---- ----, conducting wires for, 247 ---- ----, rotation of armatures in, 246 ---- ----, wear and tear of, 247 ----, the shutter, 82 ---- used with a circuit breaker, shutter, 83 Application of Ohm's law, the, 276 ---- ---- the electric light, the, 256 Arcs, firing by intersectional, 71 _Argus_, Fulton's attempt against the, 6 Armatures in Siemens' electric light apparatus, rotation of, 246 Armoured cables, single cored, 43 Armstrong's system of electrical testing, 107 Arrangement of earth plates, Brown's, 100 ---- ---- wires in McEvoy's spar torpedo, 155 Arrangements, Steward's safety cock, 25 Astatic galvanometer, the, 87 Attack with Harvey's torpedoes, methods of, 127 Attacks, boat torpedo, 191 ---- ----, methods of protecting ships against, 180 Austrian method of mooring, the, 56 ---- ---- testing, the, 109 ---- self-acting circuit closers, 64 ---- testing table, the, 108 ---- torpedo experiments, 220 ---- ---- launches, Thornycroft's, 165 ---- war, torpedo operations during the, 192 Austro-Italian war, torpedo operations during the, 188 Automatic arrangements, 10 ---- electric lamps, 248