THE EXHIBIT 495 



BOOTH 5 — THE MEASURE OF RACING CAPACITY IN THE THOROUGHBRED HORSE 



Theme-sign. 



(a) The invention of the yard-stick for racing capacity as an entity is 



possible because all of the major elements in the quality of racing 

 performance are exactly measurable for each sex, i.e., distance run 

 in furlongs and yards; weight carried in pounds, age in years and 

 seasons; and speed to the fifth of a second. 



(b) Racing Capacity. A type study for the invention of a new tool for 



the genetic study of complex and valuable traits in the higher 

 mammals, including man. 

 Exhibits: 



Charts and mathematical models, photographs and records showing the 

 inter-compensation of sex, age, weight-carried, and distance-run in 

 reference to speed. Showing also a diagram of the chromosomes of the 

 horse, and a chart giving graphical comparison of the racing capacities 

 of 10 Thoroughbred horses; namely, Princess Doreen b.f. 1921; Man 

 O'War ch.c. 1917; Exterminator ch.g. 1915; Sarazench.g. 1921; Twenty 

 Grand b.c. 1928; Equipoise ch.c. 1928; Display b.c. 1923; Gallant Fox 

 b.c. 1927; Snowflake ch.f. 1927 and Faireno b.c. 1929. 



Also a working laboratory whereby the Quality of Performance in any 

 selected truly-run race can be computed. 



The exhibits in booths 4 and 5 on the Genetics of the Thoroughbred horse 

 represent the researches made possible by the joint support of Walter J. 

 Salmon, distinguished breeder of Thoroughbred horses, and the Car- 

 negie Institution of Washington. These researches, beginning in 1923, 

 have developed a working laboratory for the investigation of problems 

 on the inheritance of racing capacity. The researches were conducted 

 by Harry H. Laughlin, with a staff of assistants. 



BOOTH 6 — MODEL EUGENICS LIBRARY 



Theme-sign. 



Every organized library — public, high school, college— interested in hu- 

 man welfare, history or biology should open a section on "Improvement 

 in the breed of man" i.e., eugenics. 

 Reference and research. 

 Exhibits: 



1. In this experimental library a model classification of eugenical litera- 

 ture in accordance with modern library practice was set up, card 

 indexes opened, and representative books, magazines, reprints, 

 clippings and pictures were classified and placed on the shelves. 



