INDEX 



311 



Liquid pressure, 86 



direction, 88 



in a hot-water boiler, 89 * 



laws, 88 *, 90 

 Liquids, definition, 67 



buoyancy, 90 



pressure, 86-90 



properties, 81 

 Litmus paper, 160 

 Little Bear, 17, 18 * 

 Little Dipper, 17 *, 18 * 

 Locomotion, organs, 295* 

 Longitude, 28, 29 

 Lunar, eclipse, 42, 43 * 



shadow, 44 * 

 Luster, 152 



Machines, 59, 60 *, 61, 62 * 

 Magnesium, 155 

 Magnetic compass, 133 *, 134 

 Magnetic needle, 134 * 

 Magnetism, 134 



and electricity, 135 

 Magnifying glass, 125 * 

 Malleability, 152 

 Mantle rock, 167, 234 

 Map making, 216 

 Marine life, 199 

 Marble, formation, 174 



uses, 174 . 



Mars, 33, 34, 35 *, 36, 37 

 Matter, definition* 46 



divisions, 47 



inorganic, 55 



living, 254 



organic, 55, 254 



physical states, 67 

 Measures, systems of, 49, 50 * 

 Melting point, 67 

 Mercuric oxide, 139 

 Mercury (metal), 154 



(planet), 33, 35*. 36 

 Meridian, 27 *, 29, 30 

 Metals, native, 153 



properties, 152 



specific gravity, 155 



uses, 155 



Metamorphic rocks, 182 

 Metric system, 49 

 Mica, 172 

 Midnight sun, 25 

 Mineral springs, 84 



Minerals, 167 



importance of studying, 175 



value, 184 

 Mining, 206 * 

 Mirror, 122 * 

 Mixtures, 48 

 Mobility, 81 

 Molecules, composition, 156 



definition, 46 



motion, 93 

 Moon, 38, 41 



apparent changes, 38 



eclipses, 42 



light, 39 



rotation and revolution, 39 



surface, 40 



time of rising, 40 

 Moraine, terminal, 246 

 Motor nerves, 291 

 Mountains, barriers, 208, 209 * 



block, 203 



folded, 203 



influence, 207 



making, 202 



of erosion, 202 



railroads, 207 *, 208 

 Muscles, antagonistic, 295 



extensor, 295 



flexor, 295 



structure, 294 * 



work, 294 



Neptune, 33, 35 *, 36 

 Nerve centers, 291, 292 

 Nerves, 291 



motor, 291 



sensory, 291 

 Nervous system, 290 



divisions, 290 



importance, 292 



useful responses, 293 

 Newcomb, Simon, 34 * 

 Nickel, 155 

 Night, 23 

 Nitrogen, 149 

 North point, 20 

 North pole, 20 

 North Star, 16, 17 *, 18 *, 19, 20 



importance of knowing, 20 



pointers, 16, 17 *, 18 * 

 Northern sky, 18 * 

 Nucleus, 263 



