148 ROBERT BENNETT BEAN 



The percentage of good sets of teeth among the boys and ghls 

 of all the groups from 11 to 16 years is 



Hyper IS. 3 Hypo 46.8 liemainder 34.4 



Among the Filipinos alone from the age of 17 to 30, both sexes, 

 it is 



Hyper 9.3 Hypo 34.3 Remainder 24.2 



It is evident that the hyper- has fewer good sets of teeth at 

 all ages than the hypo-. 



3. The average number of bad teeth 



The Filipinos below the age of 10 years may be disregarded. 

 The average number of bad teeth below the age of 10 years among 

 the German and American boys and girls is 



Hyper 0.468 Hypo 0.36 Remainder 0.30 



The average number of decayed teeth in all the groups from 

 11 to 16 years of age is 



Hyper 3.35 Hypo 1.79 Remainder 2.09 



The average number of decayed teeth among the Filipinos 

 alone from 17 to 30 years of age is 



Hyper 3.33 Hypo 2.53 Remainder 3.08 



It is evident from a consideration of the average number of bad 

 permanent teeth that the hyper-s have the worst teeth and the 

 hypo-s have the best. 



4- Racial and sexual differences 



Racial differences may be found by calculating the relative 

 number of hyper- and hypo- individuals in each group. Be- 

 tween the ages of 5 and 16 the Filipinos have 1 hyper- to 15.2 

 hypo-s, the Germans have 1 hyper- to 5.3 hypo-s, and the Amer- 

 icans have 1 hyper- to 1 hypo-. From 17 to 30 years the Fili- 

 pinos have 1 hyper- to 3.8 hypo-s. 



