Sympathetic nervous system, illustra- 

 tions of man, 202, 237, 261, 

 264 



of reptile, 193 

 of ungulate, 196 

 of whale, 173 

 relation to intelligence, power and 



personality, 201-206 

 Sympathin, 34 



Tarlton, Leslie, 80 



Teacher, responsibility for creating 



action patterns, 227, 231 

 Temperate zone, conducive to develop- 

 ment of thinking brain, 278 

 Temperature (see Cold; Heat) 

 Temperature, body, relation of oxida- 

 tion to, 20^. 

 Thinking, abstract, 212, 272 



mechanism of, 211-215 

 Thinking brain (see Brain, thinking) 

 Thomson's gazelle, defense behavior 



of, 91-94 



energy-controlling organs, 115, 121 

 Thoroughbred, 126, 149 



adrenal-thyroid pattern of, 139, 199, 



274 



energy-controlling organs, 130-141 

 influence of mutations on behavior 



of, 251-254 

 (See also Equipoise) 

 Thyroid glands, development by ani- 

 mal groups, 177-178 

 effect of captivity on, 151 

 as energy-controlling organs, in 

 animals, 3, 18, 19, 20, 21, 25, 35, 

 50, 5i,53, 58, 59,60,61,62,65, 

 72, 74-76, 82, 88, 90, 100, 107, 

 109, no, 113, 115, 119, 120, 121, 



122, 123-125,129,130,132,133, 

 139, 141, 143, 144, 146, 154, 156, 



'57, 158, 159,160, 163, 171, 172, 

 173, 174, 175, 176, 179, 181, 183, 

 184, 1 86, 187, 192, 201, 204, 207, 

 254, 276, 277 



346 



INTELLIGENCE, POWER, 



Thyroid glands, as energy-controlling 

 organs, in man, 235, 237, 239, 

 254, 258, 262, 264, 265, 274, 276, 

 277, 279, 280 



factor in constant energy, 34, 185 

 factor in maintaining warm-blooded 



state, 33 

 function in metabolic system, 188- 



191, 271 

 in man, parallel evolution with 



brain, 273 

 prime factor in superiority, 224, 



239, 256, 269 

 weight data, 284-330 

 Thyroid hormone, as adaptation 



against cold, 10 



Thyroidectomy, effect of, 188, 190 

 Thyroxin, function of, 34 



effect on oxidation in brain, 188-191 

 Tiger, energy-controlling organs, 82-85 



outburst energy of, 153 

 Totonicapan, Guatemala, field re- 

 search at, 9 



Training and education, 33, 223-233 

 in adolescence, 258 

 as deterrents to disease, 265 

 length of time required for, 225 

 Tropics, influence on energy-con- 

 trolling organs, 3, 10, 20 

 limitations on evolution of man in, 



234 



not conducive to diseases of civiliza- 

 tion, 236 



protection from heatstroke in, 24 

 Turk (horse), 129, 130, 131, 134 

 Turtle, effect of shot on, 4 



energy-controlling organs, 113-114 



U 



Ultramicroscopic life, development of, 



in 



Ultraviolet light, 1 1 1 

 Ungulates, energy-controlling organs 



of arctic and tropic, 177-178 

 weight data on, 319-330 



