AND PERSONALITY 



Inasmuch as the role of the celiac ganglia and plexuses 

 has heretofore not been determined, it would seem that the 

 lion explains it. The lion possesses the greatest power of 

 outburst energy of any animal of comparable size. 



The formula of a very small brain, a simple sympathetic 

 system, small adrenal glands, white muscle, and a slight 

 volume of blood is that of the alligator. Whereas in the lion 

 there are eighty-two branches on each side of the celiac 

 plexus, in the alligator there are but three. 



In the Museum of Intelligence, Power, and Personality 

 at the Cleveland Clinic Foundation we have illustrated 

 the sixth biological principle, that intelligence, power, and 

 personality are dependent on the absolute and relative size 

 of the brain, the thyroid gland, the heart and blood volume, 

 the celiac ganglia and plexuses, and the adrenal-sympathetic 

 system. To exploit this interesting field properly will take 

 many years, but. as a beginning we can offer studies of 

 3,734 animals, representing 284 species and 60 human 

 studies, 1 including 3 racial types and 15 nationalities. 



In our seventh biological principle we invoked Haeckel's 

 law, that ontogeny recapitulates phylogeny. Although we 

 recognize the limitations of this law, Haeckel's principle 

 would seem to account for the adrenal-gland dominance in 

 the human fetus, in infancy, and in childhood, such as is 

 exhibited in the ape of today. It was during the rise of man 

 from the ape that through natural selection the adrenal- 

 gland dominance gave way to thyroid-gland dominance. 



At the time of birth the beginning of a gradual decline of 

 the adrenal-gland dominance occurs. This decline continues 

 until about the twenty-first year. At this time the thyroid 

 gland is 2^ times the size of the adrenal glands, and the 

 rule of reason should supersede the dominance of the 

 emotions. 



For our eighth biological principle we turned to the law 

 of mutation advanced by De Vries. The rise of man to his 



1 See Appendix, Record of Body Weight and Certain Organ and Gland Weights. 



275 



