Index 



619 



Steamship, 362 ff. 



Steel, and iron, importance of, 429 ff. 



kinds of, 446 ff., 451 



manufacture of, 442 ff., 451 



tempering, 447 ff. 

 Stegomyia mosquito, 533, 536 ff., 542 



ff., 545 



Sterilization of food, 580 ff. 

 Stone, 406 ff. 

 Storage, cell, electric, 333 ff. 



of water, 218 ff. 

 Storm warnings, 5, 31 

 Storms, local, 34 ff. 

 Stratified rock, 407, 410, 414 ff. 

 Strontium salts, 176 

 Submarine, 368 



Sugar, 129, 515, 517 ff., 521, 566, 569 

 Sulfur, 61 ff., 81, 144, 433, 443, 518, 



521, 598 



Sulfur dioxid, 81, 156 ff. 

 Sulfuric acid, 119, 545 

 Sunlight, analysis of, 180 



and bacteria, 581 ff. 



and molds, 556 ff. 



and plants, 517 ff. 

 Sun's energy, 67 ff., 104 ff., 517 



temperature, 89 

 Superheated steam, 309 ff., 312 

 Suspension bridge, 280, 285 ff. 



Tangential force, 274 ff., 277 

 Tartaric acid, 129 

 Temperature, 84 ff., 89 ff., 96 



and altitude, 10, 392 ff. 



and microorganisms, 556, 568, 580 



extreme, 89 ff., 150, 392 



feeling of, 84 



kindling, 61 



measurement of, 85, 89 ff. 



of soil, 472 ff. 

 Tempering steel, 447 ff. 

 Tensile force, 282 



strength, 282, 431 

 Tetanus antitoxin, 600, 602 

 Thermograph, 89 

 Thermometer, 84 ff. 

 Thermostat, 103 

 Thorium, 160 ff. 

 Thunderstorm, 34 ff. 

 Tin, 169 



Tornado, 34 ff., 38, 41 

 Toxic products, 527, 531, 564 



Toxins, 527, 531, 593 ff., 599, 600 ff., 



607 



Tractive effort, 272, 292, 318, 320 

 Transformer, electric, 247, 328 ff. 

 Transmission of electric energy, 246 ff., 



249, 328 



Transpiration, 463 ff. 

 Transplanting, 463 

 Transportation, importance of, 251, 



368 



in air, 389 ff. 



motive force and, 253, 265 ff., 

 270 ff., 289 ff., 318 ff., 320 ff., 

 330, 349, 353, 363, 399 ff. 

 on land, 251 ff. 

 on water, 337 ff. 

 roads and, 264 ff. 

 vehicles of, 253 ff., 339 ff., 362 ff., 



389 ff. 



waterways and, 337 ff., 379 ff. 

 Truss bridge, 281 ff. 

 Tsetse fly, 532, 590 

 Tubular frame bridge, 284 ff. 

 Tungsten, 166 ff. 

 Tunnels, 268 

 Turbine, steam, 310, 364 ff., 369 



water, 241 ff., 249 

 Typhoid carriers, 217, 594 



fever, 207, 208 ff., 576, 586, 591, 



594 



bacillus, 589 

 Typhoons, 27, 30, 33 

 Typhus fever, 532, 590 ff. 



Undershot water wheel, 238 



Unit character in inheritance, 506, 513 



Vaccination, 532, 591, 604, 605 

 Vaccines, 593, 604 

 Vapor lamps, electric, 177 ff. 

 Vaporization, 152, 155, 305 ff. 

 Variation, in plants, 480 ff., 493, 496 ff., 



503, 507, 513 

 of compass, 372 ff. 

 Ventilation, 102 ff. 

 Vitiated air, 74 

 Voltage, electric, 329 

 Volume of steam, 308, 315 



Walschaert's gear, 294 

 Water, carbonated, 134, 411 

 composition of, 114 ff., 138 



