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]
- Phœnicians, [45]
- Phœnix, [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]
- Steam saw-mill, [291]
- Steam whistle, [218]
- Steel pen, [184]
- Stephenson, [185], [218]
- Stereoscope, [244]
- Stereotyping, [164]
- Sternberg, [295]
- Stethoscope, [197], [246]
- Stevens, [181]
- Sturgeon, [217]
- Suez Canal, [237]
- Sulphite process, [276]
- Syphon, [286]
- Syria, [45]
T
- Tainter, [302]
- Talbot, [221]
- Talleyrand, [261], [262]
- Taoism, [39], [263]
- Taupenot, [265]
- Telephone, [287]
- Telescope sight for ships' guns, [312]
- Telescope, [135], [136]
- Tesla, [303]
- Themistocles, [61]
- Thermit welding, [327]
- Thermometer, [142]
- Thermopile, [200], [201]
- Thermos bottle, [201]
- Thompson, Elihu, [302]
- Thomson, Benjamin, [212]
- Thomson, Sir William, [286]
- Thorium, [314]
- Threshing-machine, [177]
- Thurber, [231]
- Tilghman, [276]
- Time-lock, [241]
- Torpedoplane, [328]
- Torricelli, [142]
- Toulon, [177]
- Trafalgar, [195]
- Triger, [221]
- Tubular boiler, [214]
- Tungsten electric light, [327]
- Turtle for printing presses, [245]
- Twine-binder, [286]
- Typewriter, [231], [276]
- Typhoid bacillus, [295]
- Tyre, [72], [73]
- Tyrian Dyes, [48]