Nineveh, 39 Nitroglycerin, 241 Nobel, 277 O Oersted, 198, 199, 200 Ohm, 213 Oleomargarine, 277 Omphalopsychites, 345 Open-hearth process for steel-making, 274 Ophthalmoscope, 245 Otis, 272 Otto, 291 P Pacinnotti, 217, 283 Page, 245 Painting, 56 Paper, 101 Papin, 153 Papyrus, 25, 33 Parson's steam turbine, 309 Pasteur, 298 Patent office, 111 Paul, 172 Peloponnesian War, 63, 66 Pericles, 62 Perkins, 265 Perry, 315 Persian Gates, 74 Phalanx, 68, 69 Philip of Macedon, 66, 67 Phoenicians, 45 Phoenix, 181 Phonetic writing, 27 Phonograph, 291 Photographic roll films, 247 Photography, 181, 221 Photometer, 212 Pictet, 287 Picture-writing, 27 Pitt, 261, 262 Pixii, 216 Pizarro, 129 Planté, 266 Platinotype process, 285 Plotz, 329 Pneumatic caissons, 221 Pneumatic tire, 235 Pneumonia bacillus, 295 Poetry, 62 Portable fire engine, 214 Portland cement, 291 Porus, 75 Potassium, 182 Power-loom, 175 Prehistoric inventor, 23 Prescott, 302 Priestley, 171 Primeval weapons, 1 to 20 Princeton, U. S. S., 220 Principia, 143 Printing press, 186 Printing telegraph, 237 Printing, 110 to 115 Pulmotor, 327 Pump, 243 Punic Wars, 84, 85 Pyramids, 35, 36 Q Quadruplex telegraphy, 285 R Radio activity, 314 Radio control of moving vessels, 326 Radium, 314 Ramsay, 180 Rear driven chain for bicycles, 302 Reece, 298 Regenerative furnace, 265 Reis, 267 Renaissance, 112 Revolver, 219 Rock drill, 247 Rocket, 185 Röntgen, 293, 312 Rubicon, 94 Ruhmkorff coil, 246, 293 Ruin of the machine of civilization, 226-230 Rumford, 212 Runge, 218 Russian campaign, 196, 197 S Sadowa, 280 Safety matches, 247 Sailing vessels, 47 Salamis, 61 Santos Dumont, 326 Sargon, 41 Savage, 241 Savannah, first ocean steamship, 202 Savery, 152, 153 Schmid, 298 Schneider, 308 Schonbein, 240 Schultz, 302 Schultze, 273 Schweigg, 200 Scott Archer, 245 Screw propeller, 220 Sculpture, 62 Secondary battery, 266 Seebeck, 200 Self-binding reaper, 286 Self-induction, 215 Selligne, 221 Senefelder, 177 Sennacherib, 41 Sewing-machine, 236 Sextant, 145 Seymour, 245 Seytre, 221 Shakespeare, 205 Shell ejector, 274 Shintoism, 263 Shoemaking machine, 269 Sholes, 276 Siemens, 216, 265, 275, 294 Silencer for fire arms, 327 Sleeping-car, 265 Smeaton, 153 Smith and Wesson revolver, 247 Smokeless gunpowder, 273 Sobrero, 241 Sodium, 182 Soubeiran, 215 Sparta, 62 Spectroscope, 266 Sperry, 326 Spinning machine, 172 Sprague electric railway and motor, 303 St. Vincent, 190 Statuary, 56 Steam engine, 150 _et seq_ Steam hammer, 221 Steam plough, 294 Steam presser gauge, 244