808 



ELEMENTS OF GENERAL SCIENCE 



Swamp lands, reclamation of, 213, 



214 

 Sy minds, chemical, 60, 61 



Tadpole, 274*, 276 



Teakettle, 107 



Teeth, 2o4*, 255* 



Temperature, * 187-1 46 



Temperature, seasonal changes of, 16 



Temperature in cyclones, 33, 34 



Temperature of air, 5, 10-20 



Temperature of soils, 206 



Texas fever, 101, 292-294 



Thermometers, 11, 12, 110* 



Thermometers, wet-bulb and dry- 

 bulb, 110* 



Thunderstorms, 41, 42 



Tick, and cattle fever, 101, 292-294 



Tillage and water, 207 



Tin, 61, 135 



Tire, pneumatic, 1, 6, 10, 49 



Tornado, 35, 42*, 43* 



Trade winds, 44*, 45 



Transpiration, 115*, 116, 206, 207 



Transplanting, 240 



Transportation by water, 147-153 



Tuberculosis, 87, 301 



Tunnels, 3 



Turbines, 168, 169 



Typhoid, 87, 90, 92, 93, 155, 159 



Typhoid, death rate from, 92, 93, 

 155*, 159* 



Typhoid and flies, *93-96 



Vapor of water, 21-27, 36, 41-47, 66 

 Variation, 290*-292, 295-300 

 Vegetative reproduction, 279*, 280 

 Veins of leaf, 69, 70* 

 Vinegar and bacteria, 87 



Waste material of plants, 75 

 Water, and soil temperature, 206 

 Water, boiling point, 105*, 106*, 108 

 Water, climatic effects of, *136-146 

 Water, composition of, 58*, 59, 60 



Water, dissolving rock, 194 

 Water, free/inir pnim. 104. 108 

 Wiiti-r. pressure of, *118-133 

 Water, produced by flame, 57, 68, 62 

 Water and erosion, * 192- 196 

 Water and tillage, 207 

 Water motor, 126 

 Water power, *167-169 

 Water supply, and sewage disposal, 



*154-164 

 Water supply, sources of, 154, 168*, 



162, 163* 

 Water supply of New York City, 



158* 



Water table, 208, 209* 

 Water used by crops, 206, 207 

 Water vapor, 21-27, 36, 41-47, 66, 



103 



Water wheels, 168* 

 Water-borne commerce, 147-153 

 Weather, *28-48 

 Weather Bureau, The United States, 



46, 48, 137, 138 

 Weather forecasting, 46, 48 

 West Indies' hurricanes, 41 

 Westerly winds, belt of, 44*, 45 

 Wheat, variation in, 290* 

 Wild plants, value of, *229-232 

 Wind, *28-48 

 Wind and erosion, 221* 

 Wind belts, 44*, 45 

 Winds, cyclonic, *33-35 

 Winds, direction of, *33-35, 44, 45 

 Winds, trade, 44*, 45 

 Winds, westerly, 44*, 45 

 Work, 165-189 

 Work accomplished by heat, 182- 



184* 



Yeasts, 81, 82, 270*, 271 

 Yeasts, fermentation by, 81* 

 Yellow fever, 100, 101 



Zebu, 292, 293*, 294* 

 Zinc, 61, 135 



