5C2 



INDEX 



Lungs, 102; extent of surface, 



102 

 Lymph, 88 (fig.) 

 Lymphatic vessels, 89 (fig.) 



Machine, the living, 45 

 Maintenance of life, 6 

 Maladjustments, 179 

 Malaria, 225; and mosquitoes, 239 



(fig.) 



Malarial parasites, 225 (fig.), 239 



Malnutrition, 188 



MAltase, 263 



Malt-sugar, 94 



Man and ant, a comparison, 195 



Man-aix?, Java, 497 



Man, Cro-Magnon, 500 (fig.); evolu- 

 tion of, 495; future of, 504, 525, 

 554; in America, 502; modem, 

 500; Neanderthal, 499 (fig.); Pilt- 

 down, 498; Rhodesia, 499; sul>- 

 sfwcies of modern, 503; the 

 highest animal, 531 



Manual dexterity, 534 



Manufacture of enzyms, 93 



Marriage, 527 



Materials, food, 38; manufacture 

 of, 73; raw, 39; waste, 80 



Maturation of germ cells, 311-313, 

 (fig.) 



Measles, 225 



Mechanical injury, 189, 207, 210; 

 results of root structure, 55 



Mechani.sm, adjustor, 148; of cell 

 division, 285; of correlation, 118; 

 of crossing over, 374; of reas- 

 sortmont, 300; of tropisms, 117 



Medical science, aim of, 545; treats 

 ment of di.sease, 214 



Mediterranean type of man, 502 



Membrane, nuclear, 286 



Memory, 159, 531, 537; associated, 

 1()3, 540 



Mendel, (Iregor, 350 (fig.) 



Mendel's laws of heredity, 350 



Mental defects, 522; traits, modi- 

 fications of, 529 



Messmateism, HKi (fig.) 



Metalwlism, 73, 82; basic, 74, 175, 

 177; functional, 7fi, 122; growth, 

 75; protein, 260; wast^'ful, 78 



Metalhirg>-, 535 



Metamorphosis, 306 (fig.) 



Metaphaae, 288 



Metazoa, correlation in, 149; dis- 

 ease due to, 226; motion in, 121 



Methods, statistical, 516 



Mexican race, 526 



Mice, yellow, lethal genes in, 399 



Microorganisms, and disease, 216; 

 of soil, 272 



Migrations of animals, 481; of 

 birds, 481 



Mildews, 210 



Milk, souring of, 264; sugar of, 96, 

 264 



Mimicry, 444 



Mineral salts, 38 



Mi.stletoe, 198 (fig.) 



Mites and disease, 244 



Mo<lerately complex transporta- 

 tion systems, 86 



Motlem man, 500; sub-species of, 

 503 



Modem system of classification, 

 412 



Modifications, 3; of mental 

 traits, 529; old age, 252 



Moisture, 109, 205 



Molds, 211 



Mongolian race, 503 



Morphology, 4 



Mortality, child, 547 



Mosquitoes and disease, 239 



Moss, 328 (fig.) 



Motion, amcelwid, 22, 119; bio- 

 logical importance of, 122; cili- 

 ary, 119; classes of, 133; flagel- 

 late, 120; in metazoa, 121; of 

 alimentary tract, 96; of chromo- 

 somes, 2K8; of joints, 129; of 

 materials in plants, 56, 65; of 

 protoplasm, 14; regulation of, 

 123 



Motor nerve-cell, 153 



Mulatto, 526 



Multicellular organisms, 24; death 

 in, 255 



Muscle, cells, 122, 126; of heart, 

 128; smooth, 125; structure of 

 smooth muscle fiber, 128; form, 

 131; makc^-up of smooth, 127; 

 sense, 138 



Muscles, 122; attachments of, 129; 

 heart, 125; long, 132; skeleUl, 

 125; smooth, 125; strength of, 

 131 



Mushrooms, 210 



