Racers and Problems They Suggest 17 



In all such cases as that of the Jukes and 

 Edwards families we cannot be sure that the 

 unlike environments in which the children were 

 reared may not have been in large measure 

 responsible for the strikingly different character 

 of the offspring. Although the families were 

 contemporaries and lived in adjoining states, 

 yet the home atmospheres, the real environ- 

 mental influences, were diametrically opposite. 

 This brings up the much-debated question as to 

 which is the more potent, environment or 

 heredity. Such a question is about as sane as 

 whether wind or water is the more important in 

 the production of the waves that surge in along 

 the ocean shore. The simple fact is, the destiny 

 of the individual is the resultant of heredity 

 (what he is), environment (what he has), and 

 training (what he does), and no one element 

 can be omitted in calculating the results. The 

 object of this book is to show how important 

 heredity is and in what ways it is important. 



QUESTIONS 



I. Consider carefully the reduction in time for the 

 trotted mile since the days of Flora Temple. Estimate 



