i 9 2 INDEX 



Arteries, development, 52 



hardening of, 70 

 Arteriosclerosis, 70 

 Asia, birthplace of mankind, 5 

 Association areas of brain, 120 

 Association, inheritance, 157, 163 

 Assortative mating, 169 

 Attica, New York, 11 

 Auricle, of heart, 51 



Bacillus bulgarlcus, 71 

 Bagehot, W., 145 

 Banderlog, the, 109 

 Banolas, Spain, 24 

 Bee, instincts of, 108 

 Behavior of animals, 108 

 of man, 120 

 instinctive, 105 

 intelligent, 110, 122 

 Bell, A. G., 172 

 Birds, nesting instincts of, 108 

 Birth, 60 

 Birth control, 172 



effects of, 173 

 Birth-rate, 171-174 



American scientists, 172 

 of college graduates, 171 

 of intellectual classes, 171-174 

 Phi Beta Kappa, 172 

 Birth, ratio to deaths, 174 

 Births, multiple, 62 



proportion of male and female, 62 

 Blood cells, development, 52 



natural history, 52 

 Blood vessels, development, 52 

 "Blue baby," 60 

 Blumenbach's classification, 40 

 Body cavity, see Ccelom 

 Body proportions, changes in during 



growth, 65 



Body wall, formation of, 45 

 Bone, growth of, 67 



growth shown by madder, 67 

 Bones, cranial, ossification of, 55 



Boule, Marcelin, 24 



Boy, growth of, 67-69 



Brain cells, number in cortex, 93 



Brain, cortex, 93, 120 



Breuil, 1'Abbe, 34 



Broken Hill mine, Rhodesia, 28 



Bronze, age of, 2 



Bushmen, Africa, 12 



Caecum, 73, 74 



comparison in various animals, 74 

 Cancer, 65 



Cannibalism, 136, 144 

 Capacity, human, 122 

 Capacity, mental, dependent on inherit- 

 ance factors, 171 

 Capillaries, development, 52 

 Carbon, 99 

 Catholicism, 144 

 Cattell, 172 



Cavern, Lost Hope Inlet, 11 

 Celibacy, 169 

 Cells, 39 



interstitial, 97 

 Cerebral cortex, 93 



atrophy, 71 



center of sensation, 82 

 Cerebral sacs, 45 

 Changes, retrogressive in various 



organs, 73-75 



Characteristics, acquired, inheritance 

 of, 156-157 



of soma, 157 



Child, change in proportions, 65 

 Chimpanzee, fossil, 20 

 Chorion, 57 

 Chronological table, 4 

 Chronology, European, 3 

 Churchward, A., 12 

 Circulation, change at birth, 60 

 Civilization, 115, 134, 158 



European, 115 



evidence of, 118 



pre-Columbian, 11 



