INTELLIGENCE, POWER, 



powered animal, when shot through the heart in such a way 

 that the circulation of the blood is immediately arrested, 

 may continue to run at top speed for a distance of a hundred 

 or more yards before he falls dead. This fact challenged 

 credulity, for, from my observations in war, I had found 

 that death results instantly from a comparable shot through 

 the heart in man. 



The second phenomenon was the explosive outburst of 

 speed seen in the long leaps of the impala in escape and the 

 incredibly high and long bound of the lion in attack. 



In contrast, we observed that if an animal is shot through 

 the brain or high in the brachial plexus near the spinal 

 column, it will never move again; if shot through the heart, 

 it may run a hundred yards or more and even complete its 

 attack; if shot so that the energy of the bullet suspends 

 momentarily the action of the brain or " creases " the animal, 

 the animal may fall, then jump up, and bound away or 

 complete its charge. 



When a comparison was made of the effect of a shot 

 through the brain of a zebra, a lion, or an elephant with the 

 effect of a shot through the brain of a turtle, a crocodile, or 

 a python, a great difference was noted. In the warm- 

 blooded group death was instantaneous. In the cold-blooded 

 group there was more or less muscular activity for varying 

 periods of time, up to several hours. 



Why one animal behaves like a high-powered motor, set 

 in high gear, exhausting itself by a high expenditure of 

 energy, and another behaves like a low-powered motor, set 

 in low gear, and therefore capable of carrying on indefinitely 

 at a moderate expenditure of energy, has long been an 

 enigma. This became our problem. 



Crude dissections with a hunting knife, made in the 

 field in 1927, had disclosed a striking difference in the size of 

 the energy-controlling organs in the various species of 

 animals. It was therefore believed that a study of the 

 evolution of the energy or oxidation-controlling system 



