AND PERSONALITY 



Herod (thoroughbred), 130, 131, 134, 



I3S 



Hewlett, J. Raymond, 6, 74, 102-104 



Hill, A. V., 21 



Hippopotamus, 73 

 action pattern, 74 

 energy-controlling system, 74-77 

 maintenance of body temperature, 



25 



Hoffman, Frederick L., 261 

 Horse family, 126-149 

 Arabian, I20,/. 

 ass, 142-149 

 draft horse, 140-142 

 Shetland pony, 129-131, 142-144, 



149 



thoroughbred, 129-140 

 zebra, 143-145 

 Horsley, Sir Victor, 187 

 Humidity, adaptation of man to, 240 

 effect on energy-controlling system, 



270 



Hunting technique, relation to energy- 

 controlling system, 99-101 

 Huntington, Ellsworth, "Civilization 



and Climate," 23771. 

 Hybrids, 251, 276 

 Hypertension, essential, 3, 204, 236, 



242, 250, 257, 263 

 malignant, 248 



Hyperthyroidism (see Exophthalmic 

 goiter) 



Instability, nervous, examples in 



thoroughbreds, 135-138 

 Instincts, as survivals of phylogenetic 



action patterns, 227 

 Intelligence, power and personality, 

 based on pattern of energy-con- 

 trolling organs, 36 

 basis of difference, in man and 



ape, 195 



of elephant, 108 



of Equipoise (thoroughbred), 146 

 evidence in herd leadership, 90 

 formula for preservation of, 280 

 heatstroke a factor in determining, 



25 

 pattern, for all animal life, 207, 



269, 275 

 in horse, I26/. 



in mammals, birds and fish, 125 

 for man, plus thinking brain, 



215, 224 



for primate and man, 201 

 purpose of study of, 3 

 relation to mutations in energy- 

 controlling organs, 276 

 requirement for life in cold cli- 

 mate, 184 

 Intestines and stomach, weight data, 



284-330 

 Invertebrates, weight data, 284 



Impala, energy-controlling organs, 88, 



163 



outburst energy of, 4 

 Individualist, position in modern 



society, 232 

 Infancy, adrenal-thyroid ratio in, 199, 



275 

 behavior in, 199, 257 



primitive sources of, 227 

 Inheritance, principle of, 129 

 Insectivores, weight data of, 304 

 Insects, heat elimination by, 23 



Larsen, Nils P., 10 

 Leadership, technique of, 229 

 Leopard, 87 



"Life line," 210-215, 219 

 Life span, of elephant, no 



of mouse, no 



of warm- and cold-blooded animals. 



59 



Lightning, 15, in, 166 

 Line breeding, absence of mutation in, 



251, 276 

 in herd, 82, 90 

 from thoroughbreds, 135 



341 



