314 FIRST YEAR COURSE IN GENERAL SCIENCE 



Standard time, 30 

 Starch making, 269 



light and chlorophyll necessary, 



270 

 Stars, 14 



apparent motion, 21 



brightness, 19 



change in position, 22 



distance, 19 



number, 14 



visible all the year, 17 

 Steam, expansion, 79 



in volcanic eruptions, 228, 230, 

 231 



pressure, 101 

 Steel, 152 



Stems, functions, 267 

 Storms, 113 



cyclonic, 114 



local, 115 



tropical, 115 

 Streams, cause, 84 



temporary, 233 

 Substance, definition, 47 

 Suction pumps, 103, 104 * 

 Suffocation, 141 

 Sulphur, 151 



oxide, 152 

 Sun, 22, 23 



apparent motion, 24 



at noon, 27 



eclipses, 42, 43 * 



source of energy, 287 

 Sunrise, 23, 26 * 

 Symbols, chemical, 155 



Taurus, 15, 16, 21 



Telescopes, 43 



Temperature, conditions affecting, 



116 



Tenacity, 54 

 Tendon, 294 

 Terminal moraine, 246 

 Test, definition, 158 

 Thermometer, 71 



making, 71 



laboratory, 73 * 

 Thunder, 115, 129 

 Tides, 198, 199 * 

 Time, 29, 30 



belts, 28 *, 30 



standard, 30 



Tin, 155 



Topographic maps, 216, 222 * 



of the U. S., 221 



uses, 223 



Topography, definition, 216 

 Tornado, 112, 114* 

 Torricelli's experiment, 97 

 Trade winds, 113 

 Translucent medium, 121 

 Transparent medium, 121 

 Tropic of Cancer, 25 



Uranus, 33, 35 *, 36 



Vacuum, 100 



Valley contours, 220 



Vapors, 67 



Vega, 19 



Veins, in rock, 184 



of minerals, 205 

 Venus, 33, 34, 35 *, 36 

 Venus fly trap, 255 

 Vertebrates, 290 



study of, 292 



Vesuvius in eruption, 229 * 

 Viscosity, 81 

 Vision, 121 

 Volatility, 81 

 Volcanoes, 228 



active, 228 



dormant, 228 



eruptions, 229, 230 



extinct, 228 

 Volume, 49, 51 * 



unit of, 63 



Waste products from oxidation, 257 

 Water, carbonated, 94 



composition, 149 



excretion by plants, 269 



influence on climate, 78 



in plants, 269 



natural, 83 



necessity for, 259 



soda, 94 



Water power, 84 * 

 Water-worn rock, 177 * 

 Weather, 108 



Bureau, 108 * 



maps, 110*, 111 



records, 109 

 Weathering, 233 



