6io 



INDEX 



"Mother India," 275 

 Multicellular and unicellular organ- 

 isms contrasted, 197 

 Muscle, contraction of, 60 

 Mutations, 586 



Nascent races, 158 



National Crime Commission, 385 



Nature versus nurture, ix 



control of, x, 471-474, 488 

 Nebulae, 10 

 Negro, see black races 

 Negroes and whites, contrasted, 180 



crosses, 561 



in respect to climate, 319 



in urban and rural populations, 354 

 Neomechanistic school, the, 209 

 Nerve cells (neurones), 102, 248 

 Nervous integrations in man, 246-263 

 Neurology, progress in, 450 

 Neutrality of blood, constancy of, 



240-242 

 Nucleus, as a sanctuary, 51, 195 



in primitive forms, 35, 45~47 



structure of, 192 

 Nurture versus nature, ix, 471-474, 



488 

 Nutritional changes, effect on cells, 



213 



Ocean, change in composition of, 47. 

 48 



increase in magnesium, 49 



increase in sodium, 49 

 Opinion, see human 

 Organisms, the most minute, 37 



origin, 38 



primitive, 44 



survival of, 469-471 



unity of, 205 

 Orion, 10 

 Ovaries, 243 

 Oxygen, absent on Venus, 16 



atmospheric, 7-10 



chemotropic responses to, 144 



in earth's crust, 8 



maintenance of supply, 232-239 



present on Mars, 18 

 Ozone, in atmosphere, 9 



Palaeozoic, s^ 

 Papuans, 170 

 Pernicious anemia, 344 



Personal contact, in spread of dis- 

 ease, 372-374 

 Personality, development of, 115, 116 



scat of, 1 1 3 

 Philippinos, 563 

 Philosophy, social, 466 

 Pituitary gland and gigantism, 244, 



452 

 Planet, as abode of life, 6 

 atmospheric oxygen of, 7 

 rotation of, 7 

 superficial gravity of, 9 

 Poisoning from food, 346 

 Polyandry, 269-271 

 Polygyny, 269-271 

 Polynesian-hybrids, 562 

 Polynesians, 171 

 Population, see human 

 Potassium, proportion to sodium, 47 

 Preventive medicine, 453-456 

 Primates, become arboreal, 75, 78 

 classification, 107 

 emotions in, 135, 136 

 language in, 131, 132 

 memory in, 128 

 mental evolution in, 11 5-1 38 

 skill in balancing, 79 

 social organization in, 137 

 Primitive life, age of, 55 

 Progressive education, 468-488 

 Promiscuity, 268-271 

 Proterozoic, s^ 



Psychology, revolution in, 481, 485 

 Psychozoic, 56 

 Puberty, 243 

 Pulse-rate and temperature, 3 1 2 



Rabies, 37 



Race, and crime, 388, 563 



and temperament, 558 



what medicine has done for, 428 

 Race characters, 159 



changes in, 162-164 



in respect to climate, 319-321, 

 325-327 

 Race crossing and improvement, 565 

 Race improvement, application of 

 biological principles, 574-576 



the distant future, 584-587 



improvement in heredity, 572-574 



principles of good breeding, 567- 

 571 



