THE EXHIBIT 501 



8. (a) Endocrine exhibit: Phylogenetic change produced by endocrine 



treatment in salamanders. Role of the anterior pituitary gland 



in production of red pigment in salamanders, 

 (b) Environment exhibit: Influence of light in the return of vision 



and development of pigmentation in blind cave salamander. 

 Exhibited by: Dr. G. K. Noble and S. H. Pope, American Museum of 



Natural History, New York, N. Y. 



9. Live guinea-pigs showing inheritance of trembling and waltzing. 

 Exhibited by: Professor Heman L. Ibsen, Department of Animal 



Husbandry, Kansas State College, Manhattan, Kansas. 



10. Charts (2) showing racial improvements by genetic breeding. 

 Exhibited by: Mount Hope Farm, Williamstown, Mass. 



1. Graph showing improvement in number of eggs. 



2. Chart of a good pedigree. 



11. Pedigree showing plumage color in Andalusian Fowl. 

 Exhibited by: Eugenics Record Office, Cold Spring Harbor, N. Y. 



BOOTH 11 HEREDITY OF MENTAL DEFECTS 



Theme-sign. 



Pedigree charts on Mental Abnormalities in Man. 

 Exhibits: 



1. Charts (10) showing expectation of mental disease, rates of inci- 



dence, expectation of life of insane and death rates of insane. 

 Exhibited by: N. Y. State Department of Mental Hygiene, Dr. 

 Horatio M. Pollock, Director, Albany, N. Y. 



2. Pedigree showing probable hereditary impulse to self-destruction. 

 Exhibited by: Miss Anette Phelan, Teachers College, New York, 



N. Y. 



3. Charts (10) showing influence of alcohol and heredity. 

 Exhibited by: Foundation for Narcotic Research, 150 Fifth Ave., 



New York, N. Y. 



4. Pedigree chart showing heredity in a family of criminals. 

 Exhibited by: Theophil Laanes, Cold Spring Harbor, N. Y. 



5. Chart on the Dack Family of Social Inadequates. 



Exhibited by: Dr. William Sandy, Warren State Hospital, Warren, 

 Pa. 



6. "Hereditary Factors in 600 Institutionalized Epileptics" — 11 charts. 

 Exhibited by: Calvert Stein, M.D., Monson State Hospital, Palmer, 



Mass. 



