310 FIRST YEAR COURSE IN GENERAL SCIENCE 



Gases, properties, 93 



relation between pressure and 

 volume, 101 * 



solubility, 93 

 Gems, 170 



Generator of electricity, 136 * 

 Germination, process, 279 



result, 279 

 Glacial, drift, 248 



lakes, 248, 249 * 

 Glaciated rock, 247 * 

 Glacier, beginning, 244 



in Switzerland, 245 *, 246 * 



retreat, 246 



work, 245 

 Gneiss, 182 

 Gold, 153 

 Granite, formation, 178 



quarry, 178 * 



use, 179 



Gray, Asa, 271 * 

 Great Bear, 17, 18 * 

 Growth movements, of cells, 263 



of plants, 282 

 Gulf Stream, 197 

 Gypsum, 174 



Hachure maps, 216, 217 * 



Hardness, 53 



Heat, absorbed by water, 78 



and energy, 79 



conduction, 74 



convection, 75 



effects, 67, 71 



intensity, 77 



quantity, 77 



radiation, 75 



sources, 71 



vertical and oblique rays, 116, 



117* 



Henry, Joseph, 131 * 

 Hornblende, 172 

 Hot water heating, 76 * 

 Hydraulic presses, 81, 82 * 

 Hydrogen, 148* 



Igneous rock, 178 

 Ignition point, 141 

 Incompressibility, 81 

 Incandescence, 120 

 Incandescent lights, 136 

 Indigestible residue, 304 



Inertia, 52 

 Inorganic matter, 55 

 Instinct, 293 

 Insulators, 129 

 Iron, 152 



reduction, 169 

 Irrigation, 242 

 Irritability, definition, 54 



in animals, 254 



in plants, 254, 285 



Japan Current, 197 

 Jupiter, 33, 34, 35 *, 36, 37 



Kindling point, 141 



Lakes, causes, 248, 249, 250 



glacial, 248, 249 * 



sources of rivers, 250 



uses, 250 

 Lava, 179 



sheets and dikes, 231 

 Latitude, 28 



Laws, of Conservation of Matter, 

 142 



of Definite Proportions, 142 



of liquid pressure, 88, 90. 

 Lead, 155 

 Leaves, cells, 268 * 



chlorophyll grains, 268 *, 270 



compound, 267 *, 268 



functions, 268 



simple, 267 *, 268 



starch making, 269 

 Lenses, 123, 125* 

 Leo, 16, 21, 33 

 Lever, 59, 60 * 

 Lift pump, 103, 104 *, 105 

 Light, a form of energy, 121 

 Light, absorbed, 121 



a form of energy, 121 



in starch making, 270 



influence on plants, 282, 283 *, 

 284 



intensity, 120 



reflected, 121, 122 * 



refracted, 123 *, 124 * 



sources, 120 



transmitted, 121 

 Lightning, 115, 129 

 Limestone, 180 



quarry, 181 * 



