INDEX 



303 



Thermograph, 51 

 Thermometer, Centigrade, 47 



clock, 50 



Fahrenheit, 47 



maximum, 51 



minimum, 51 



scales, 47 



Thermometers, other, 56 

 Thermos bottle, 89 

 Thermostat, 51 

 Thoracic duct, 261 

 Tides, 175 

 Time belts, 182 



on the earth, 11 



standard, 183 



sun, 182 

 Tinctures, 129 

 Tissue, connective, 240 

 Tissues, 212 

 Tobacco, 292 

 Touch, 285 

 Toxins, 232 

 Trachea, 268 

 Transformers, 207 

 Trees, 221 

 Tropics, 184 

 Turbines, 70 

 Type metal, 133 



Veins, 260 

 Ventilation, 271 

 Ventricle, 263 

 Vernier, 121 

 Vertebrae, 237 

 Vertebrates, 221 

 Vibrations, forced, 169 



sympathetic, 169 

 Voice, 272 

 Volatile liquids, 101 

 Voltaic cell, 205 



W 



Warping, 115 

 Warts, 276 

 Water, alkali, 131 



an aid to weathering, 224 



hard, 132 



level, 113 



mineral, 131 



of crystallization, 133 



softening, 132 



specific heat of, 61 



vapor in saturated air, 107 

 Weight, 39 



Welsbach gas light, 73 

 Wind, 95 

 Winter, 11 



U 



Universe, extent of, 5 

 Ureter, 282 



X-rays, 163 



Yawning, 273 

 Year, 11 



Vacuoles, 212 

 Vacuum, 13 

 Vapors, gases and, 103 

 Variation in nature, 225 

 Varieties, 228 



Zero, 47 



absolute, 48 

 Zones, 183 

 Zoology, 2 



