  - Air, fighting waves, 334
- raising ship, on, 319
- war in, 123
- Airplane, ambulance, 146
- armored, 139
- artillery-spotting, 131
- camera, 173
- cartridges, 131
- classes of work, 127
- fighting among clouds, 137
- flying boats, 144
- gasolene tank, 130
- giant, 132
- hospital, 146
- launching from ship, 303
- Liberty motor, 142
- scouting, 125
- scouts, 128
- speed of, 134
- spotting, 177
- training spotters, 180
- wireless telephone, 194
- See also Seaplane
- Ambulance airplane, 146
- Armored diving-suit, 330
- Arms and armor, 111
- Artillery, hand, 23
- Atmosphere, shooting beyond, 64
- Audion, 185
- Balloon, Blimp, 260
- Balloon, kite, 174
- principles, 150
- record flight, 65
- Barbed wire, 15
- cylinders, 17
- gate, trench, 9
- gates through, 15
- shelling, 16
- Barge for towing seaplanes, 302
- Barrage, grenade, 27
- Battle-fields, miniature, 180
- Blimp, 260
- Blisters on ships, 307
- Boats, electric, 308
- Bombs to destroy barbed wire, 16
- Breakwater, pneumatic, 335
- Browning, John M., 56
- Buildings, shadowless, 227
- Caisson disease, 325
- Caliber, 68
- Camera, airplane, 173
- Camouflage and camoufleurs, 211
- buildings, 227
- grass, 229
- horse, 223
- land, 290
- Ocean currents, 285
- Optical illusions, 215
- Oxy-hydrogen torch, submarine, 329
- Paint in war, 209
- Papier mÂchÉ heads, 13
- Papier mÂchÉ horse, 223
- Parachute, 175
- grenade, 31
- search-light shell, 84
- Paravanes, 288
- Periscope, submarine, 244
- Pill-boxes, 59
- Pneumatic breakwater, 335
- Pontoons, salvage, 320
- Propeller, shooting through, 136
- Radio, see Wireless
- Railroad, mine, 294
- Railways, trench, 10
- Range-finder, 170
- Range, getting the, 169
- Range of guns, increasing, 67
- Range, torpedo, 213
- Rats, freeing trenches of, 94
- Rifle grenade, 28
- Rifle, machine, 55
- Rifle stand, fixed, 14
- Roads, camouflage, 225
- Salvage, 310
- diving, 324
- ice-tongs, 334
- lifting-magnets, 334
- methods, 317
- pneumatic, 319
- pontoons, 320
- shackles on ships, 333
- submarine F-4, 321
- submarine sphere, 332
- Scouts, airplane, 128
- Sea, deep, conditions, 312
- Sea gulls finding submarines, 258
- Sea lions locating submarines, 259
- Sea tank, 299
- Seaplane, 143
- automatic, 145
- submarine patrol, 259
- torpedo, 145
- towing-barges, 302
- Search-light shell, 84
- Shackles, salvage, 333
- Shadowless buildings, 227
- Shell, gas, 95
- grapnel, 16
- search-light, 84
- shrapnel, 83
- Stokes mortar, 39
- Shield on wheels, 114
- Ships, airplane, 304
- Ships, blisters, 307
|
  |
