AND PERSONALITY 



Rift Valley, Tanganyika, field research 



in, 6, 42-46, 69 

 Robbins, Lewis L., 8 

 Rodents, energy-controlling system of, 



19 



in arctic and tropics, 177-178 

 weight data on, 313-319 

 Roxana (thoroughbred), energy-con- 

 trolling system, 135-138 



Salmon, energy-controlling organs, 121 

 Sea, source of elements of life, 167 

 Sea water, composition of, in 

 Seal, energy-controlling organs, 1 75-1 76 

 Selby, Roger A., 138 

 Senses, special, 16, 17 



compensation in development of, 66 

 correlation with energy-controlling 



system, 90 

 development for survival value, 



94-98, 213 

 Serval cat, 87 



Sex differentiation under natural selec- 

 tion, 154 



Sex hormones, 155 

 Shark, sand, energy-controlling organs, 



112-113 



tiger, energy-controlling organs, 114 

 Sheep, effect of domestication on, 147- 



149 



Shetland pony, 126, 148, 149 

 (See also English mares) 

 energy-controlling system, 129-130, 



132-134, 143, 144 



Skin, as preservative of body tempera- 

 ture, 25, 122 

 Sloth, energy-controlling organs, 121- 



122 



Soldier's heart (see Neurocirculatory 



asthenia) 

 Soza, Ezequiel, 9 

 Sparrow, brain, 63 

 Speech mechanism, 214 

 Spirit, conception of, by early man, 218 

 Splanchnic nerves, 49, 107, 203 



Spleen, weight data, 284-330 



Static charge of particles floating in 



air, principle of, 31 

 Sting ray, energy-controlling organs, 



115, 117-121, 273 

 neuromuscular mechanism, 117 

 Stomach and intestines, weight data, 



284-330 



Stork, energy-controlling organs, 54 

 Storm variables, effect on energy-con- 

 trolling system, 241-250, 270 

 Subarctic, energy-controlling organs 

 of animals in, 10, 173-184 passim 

 Subarctic expedition, field research on, 



165-184 



Superintellect, 259 



Survival value, determinant in evolu- 

 tion, 19 

 in development of special senses, 



66, 94-98 

 of organs useful to man, 213, 224, 



269, 277 



Sweating, 22, 23, 140, 170 

 Swett, W. W., 150 



C. A. Mathews, F. W. Miller, and 

 R. R. Graves, "Variations 

 Recorded ... of 593 Dairy 

 Cows . . . ," 282n. 

 Fred W. Miller, R. R. Graves, W. H. 

 Black, and G. T. Creech, "Com- 

 parative Conformation, Anat- 

 omy and Udder Characteristics 

 of Cows . . . ," 282^. 

 Swine, effect of domestication on, 147 

 Sympathetic nervous system, 3, 18, 



32, 34, 1 08 



illustrations of alligator, 193 

 of amphibian, 192 

 of bird, 194 

 of carnivore, 197, 198 

 of cetacean, 198, 199 

 of chimpanzee, 200 

 of crustacean, 189 

 of duck bill, 195 

 of fish, 191 

 of insect, 190 

 of lion, 203 



345 



