494 THE EXHIBIT 



Exhibited by: Eugenics Survey of Vermont, 162 College Street, 

 Burlington, Vt. 



12. Measurement of intelligence in a rural area of England. 

 Exhibited by: J. B. Russell, B.Sc, Board of Education, London, Eng- 

 land. 



13. Placards (3) showing effect of environment upon intelligence of 



children. 

 Exhibited by: Beth L. Wellman, Associate Professor of Research, 

 Iowa Child Welfare Research Station, University of Iowa, Iowa 

 City, Iowa. 



14. Charts (3) on Nature and Nurture. 



Exhibited by: Kaiser Wilhelm Institute of Anthropologie, Berlin- 

 Dahlem, Ihnestrasse 22/24, Germany. 



15. Photographs showing children in industry, street trades and agricul- 



ture. 

 Exhibited by: National Child Labor Committee, 331 Fourth Ave., 

 New York, N. Y. 



16. "The Children's Charter." 



Exhibited by: White House Conference on Child Health and Pro- 

 tection, Washington, D. C. 



BOOTH 4 — THE INHERITANCE OF RACING CAPACITY IN THE 

 THOROUGHBRED HORSE 



Theme-sign. 



(a) The Thoroughbred Horse — For traits not predictable by Mendelian 



rules this method of study provides a new prediction-tool as definite 

 for complex qualities which vary continuously as Mendelism is for 

 combinations of definitely segregable units. 



(b) The direct object of this research is to learn how to predict by what 



probability the prospective foal will possess any given racing 

 capacity. 

 Exhibits: 



Showing the studies on the inheritance of racing capacity which led to the 



development of the mathematical formula covering this subject. 

 Pictures and pedigree analyses of 18 famous horses. 

 A mathematical model of the formula for the inheritance of racing capac- 

 ity which can be used graphically to determine the probability that the 

 foal, of any given descent in reference to ancestral racing capacity, will 

 possess any selected racing capacity. 



