INDEX 



273 



sensitivity of, 120-21 

 Plato, 221 



Pleistocene ice ages, 58, 90 

 Plesianthropus, 60 

 Poincare, Henri, 171 

 Pollen, dry sperm, 47 

 Population 



genetics, 40-42 



of world, 192-93, 197, 242; see 

 also Overpopulation 



problem, 242 



size of, 41-42 

 Population: Differential Fertility, 



210 

 Pre-Cambrian rocks, 30 

 Pressey, C. L., 208 

 Primates, 6, 55 



small brain of, 60-61 



trend to family life, 90-94, 219-21 

 Progression 



continuous, in man only, 54 



of plants and animals, 44-55 

 Pronghorns, 76 

 Protoplasm, analysis of, 28 

 Protozoa 



body conducts impulses, 1 14 



learning by experience, 116 



properties of, 109-13 

 Puerto Rico 



birth control in, 199 



overpopulation problem, 196-99, 

 202 

 "Pulse beat" of mesons, 18 

 Purpose 



in evolution, 44-45 



in mind-in-matter-energy, 238-39 



in universe, 8-9 



involves responsibility, 229-30 



Quails, 76 

 Queen 



ant, 145 



bee, 80-81, 150-52 



Racial differences, blending of, 241 

 Radiation, dangers of, 245 

 Red bread mold, 32 



Red deer, of Scotland, 79 



Red shift, 16-17 



Regulatory self-control, 231-32 



Reindeer, 79 



Reiser, O. L., 21-22, 183, 225, 230- 

 31 



Relativity, theory of, 11, 17 



Religion 

 development of, 104-7 

 evolution of, 95 

 failure of, 181-82 



Reproduction, of organisms, 189-92 



Reptile, 133 



amnion, sack, 52 



Resources, depletion of, 242-43, 248 



Response, of protoplasm, 109-13 



Responsibility, importance in eth- 

 ics, 229-30 



Retrogression and degeneracy in 

 rocks, 54 



Rhesus monkeys, compared vv^ith 

 nursery children, 160-62 



Rhine, J. B., 247 



Rhodesian man, 60 



Robinson, Francis, 208 



Robinson, J. T., 61 



Rocks, retrogression in, 54 



Roman Empire, 244 



Roundworms, 49 



Royal Commission on Population, 

 212-13 



Russell, H. N. 



twin star collision, 14 



Schrodinger, Erwin, 119, 236 



Science and Sanity, 186 



Science, of ethics, 230-33 



Scientific humanism, 230-32 



Scientific leadership, need for, 248- 

 49 



Scout bees, 153-57 



Sea anemones, 122-23 



Selection, and control of matings, 

 241, 246; see also Natural se- 

 lection 



Semantics, role of, 184-88, 247 



Sexual reproduction, shuffles hered- 

 itary complex, 39-40 



