INDEX 



479 



Lodestones, 125 



Luminous bodies, 150 



Lungs, 52, 376, 379, 380, 381 



Lye, 192, 200 



Lymph, 350, 366, 373, 378, 379 



Machines, 174 

 Magnesium in soil, 275 

 Magnetic, field, 127 



poles, 128 

 Magnets, 17, 125 

 Magnifying lens, 165 

 Malic acid, 189 

 Maltose, 349, 361, 362 

 Mammals, 331, 338 

 Man, 334, 338 

 Manganese dioxide, 50 

 Manometer, 226 

 Mantle, incandescent, 225 



rock, 256, 258 

 Maple, 294 

 Marble, 122, 191, 262 

 Marsh gas, 114 

 Mass, 18, 20, 32 



center of, 34 

 Match, 6, 69 

 Matches, friction, 210 



parlor, 210 



safety, 211 

 Matter, 4 

 Measles, 448 

 Medulla oblongata, 398 

 Memory, 405 

 Mercuric iodide, 454 

 Meniscus, 30 

 Mercuric oxide, 46, 49, 

 Mercury, 29, 40, 46, 56 



chloride, 453 



fulminate, 22 

 Metacarpals, 344 

 Metals, 98 



corrosion, 190 



oxides, 190 



Metamorphic rocks, 262, 263 

 Metamorphosis, 322 

 Metatarsals, 344 

 Meteorology, 249 

 Meter, 7, 8 



Meter, electric, 228 



gas, 226 



water, 209 



Metric system, 7, 9, 12, 13 

 Method, scientific, 2, 3 

 Mica, 221, 259 

 Microbes, 303 

 Microscope, 165 

 Midbrain, 399 

 Mildew, 304 

 Milk, 88, 432 

 Mind, 399, 410 

 Minerals, 98, 347 

 Mirrors, 156 

 Mixtures, 97 



Modern conveniences, 207 

 Modified leaves, 288 

 Moisture of air, 235 

 Moisture in air, need of, 220 

 Molecules, 60 

 Mollusks, 319 

 Monsoons, 246 

 Moonlight, 150, 158 

 Mordants, 203 

 Morse, S. F. B., 140 

 Mortar, 123 



Mosquito, 323, 426, 429 

 Mosses, 301, 304 

 Moths, 323 

 Motors, electric, 145 

 Mould, 304 

 Mouth, 351 

 Mucus, 350 

 Muriatic acid, 105 

 Muscle, 340, 344 

 Mushrooms, 304 

 Mussel, 319 

 Myosin, 348 



Nails, 389 

 Natural gas, 114 

 Nature, 1 

 Nerve cells, 396 



tissue, 340, 396 

 Nervous system, 395, 402 

 Neuron, 396, 404 

 Neutralization; Salts, 193 

 Newton, Sir Isaac, 17, 161 

 Niagara, 261 



