S. Safety cock arrangement, Steward's, 25 ---- plug, Mathieson's cement, 21 ---- ---- McEvoy's papier maché, 22 Schibau's Russian torpedo boats, 178 Science of torpedo warfare, the, 15 Sea cell test for insulation, 106 ---- ---- tests, 100 ---- service cables, 43 Second class torpedo launches, Thornycroft's, 169 Self-acting circuit closer, the Austrian, 64 Sensitive fuzes, 23 Service cables, land, 43 ---- ----, sea, 43 ---- platinum wire fuze, English, 33 Ship _Alarm_, Admiral Porter's torpedo, 159 ---- defence, 10 ----, Fulton's block, 5 Ships against torpedo attacks, methods of protecting, 180 ----, employment of torpedo, 158 Shunt, definition of a, 95 ---- for Siemens' electric light, self-acting, 245 Shutter apparatus, firing keys and, 80 ---- ----, the, 82 ---- used with a circuit breaker, 83 ---- instrument and observing telescope, 84 Siemens' electric cables, 40 ---- ---- light apparatus, 241 ---- ----, conducting wires for, 247 ---- ----, description of, 241 ---- ----, power and light produced by, 244 ---- ----, rotation of armatures in, 246 ---- ----, self-acting shunt for, 245 ---- ----, wear and tear of, 247 ---- low tension dynamo machine, 75 ---- patent electric lamp, 248 ---- permanent joints, 47 ---- universal galvanometer, 89 ---- ---- tables, 287 Signal, firing by preconcerted, 71 Signals employed in diving, 263 Silvertown electric cables, 41 Singer's mechanical mine, 19 ---- ----, McEvoy's improved, 20 Single and double fluid batteries, 272 ---- cored armoured cables, 43 ---- ---- unarmoured cables, 43 ---- fluid cell, action in a, 273 ---- main system, McEvoy's, 283 ---- rope moorings, 56 Size of torpedo charges, 218 Soukoum Kaleh, Russian torpedo attack at, 201 Soulina, Russian torpedo attack at, 198 Spanish torpedo boats, Yarrow's, 175 Spar or outrigger torpedoes, 154 ---- torpedo, McEvoy's duplex, 154 ---- torpedoes, Fulton's, 5 Special cables, 43 Spherical shaped torpedo case, the, 32 Spiral spring circuit closer, Mathieson's, 63 Stake torpedoes, 18 State of the explosive substance, the physical, 204 Statham's high tension fuze, 35 Stationary mines, Fulton's, 5 Steward's safety cock arrangement, 25 Stokes Bay, experiments with countermines at, 236 Submarine boat, Bushnell's, 2, 184 ---- ----, Confederate, 185 ---- ----, French, 185 ---- boats, 183 ---- ----, qualifications essential to, 184 ---- mines 13 ---- ----, during the Crimean and American wars, 27 ---- ----, rules for using, 29 ---- ----, sweeping for, 112 ---- ----, electrical, 27 ---- ----, advantages of, 28 ---- ----, defects of, 29 ---- ----, mooring, 54 Submersion, tests after, 106 Success in torpedo warfare, elements of, 16 _Suna_, destruction of the Turkish vessel, 194 Swedish torpedo launch, Thornycroft's, 165 Sweeping for submarine mines, 112 Switch plates, commutators or, 96