THE EXHIBIT 497 



3. Picture drawn by a color blind man. Ishihara color blind test. 

 Exhibited by: Museum of Science and Industry, 220 East 42nd 



Street, New York, N. Y. 



4. Case of deformed eye-balls and chart describing structure of the eye. 

 Exhibited by: Dr. Bernard Samuels, 57 West 57th St., New York, 



N. Y. 



5. Charts showing heredity of eye color. Pedigrees of pathological 



traits and of illnesses. 

 Exhibited by: Dr. G. P. Frets, Mental Hospital, Maasoord, Poor- 

 tugaal, Holland. 



6. Charts (28) showing eye defects and their inheritance. 

 Exhibited by: Dr. P. J. Waardenberg, Velperweg 22, Arnhem, Hol- 

 land. 



7. Charts (6) showing 22 different kinds of inherited eye defects. 

 Exhibited by: Dr. M. T. Macklin, University of Western Ontario, 



London, Ontario, Canada. 



8. Pedigree showing occurrence of epicanthus and ptosis. 

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



9. Case of models of the organs of hearing and sight. 



Exhibited by: Clay-Adams Co., 117 East 24th Street, New York, 

 N. Y. 



10. Audiometer for testing hearing. 



Exhibited by: Graybar Electric Company, Graybar Bldg., New 

 York, N. Y. 



11. "Community study of deafness" — 2 large wall panels. "Inheritance 



of deafness" — 7 charts. Audiograms. 

 Exhibited by: Clarke School for the Deaf, Northampton, Mass. 



12. Model of human ear, section through middle ear, section through 



middle ear with operation performed, transparent temporal bone 

 in glass container and labyrinth model. 

 Exhibited by: Pfau's American Instrument Co., 2 East 23rd Street, 

 New York, N. Y. 



13. Pedigree showing inheritance of bone fragility and blue sclerotics. 

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



14. Charts (5) showing heredity of otosclerosis. 



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



15. Pedigree showing otosclerosis, blue sclerotics and bone fragility. 

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



16. Pedigree showing Familial Occurrence of Deaf-mutism. Exhibited 

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



