132 ROBERT BENNETT BEAN 



in the Filipinos than in the Germans and Americans, and earlier 

 in the Americans than in the Germans. 



The second molars erupt more than a year earlier in the girls 

 than in the boys, except in the Filipinos, where the boys are 

 slightly more precocious than the girls, although the lower second 

 molars erupt earlier in the Filipino girls than in the Filipino 

 boys. 



The third molars. The third molars begin to appear in the 

 Filipinos at the age of 13, and from 61 per cent to 83 per cent of 

 the third molars have erupted in the Filipinos at the age of 20 

 and over. 



The third molars have appeared in none of the German and 

 American boys up to the age of 18 years, but they begin to appear 

 in the American girls at the age of 16 years, and the left lower 

 third molar has begun to erupt in the German girls also at the 

 age of 16 years. The girls therefore appear to be more precocious 

 in the eruption of the third molars than the boys, and the American 

 girls more precocious than the German girls. The latter is not 

 true among the Filipinos at the beginning of eruption, which 

 occurs first among the Filipino boys, but as age advances up to 

 20 the Filipino girls become more advanced than the Filipino 

 boys, and at the age of 20 and thereafter the girls have a greater 

 average number of third molar teeth erupted than the boys. 



There is practically no difference in the time of eruption of 

 the third molar teeth on the two sides of the mouth, but the 

 lower third molar erupt slightly earlier than the upper. 



Resume. On pages 128 to 132 we have considered the eruption 

 of the teeth from the standpoint of the beginning of eruption, 

 the end of eruption, and the average per cent. The results are as 

 follows: The order of eruption in groups is (1) Filipino girls, 

 (2) Filipino boys, (3) American girls, (4) German girls, (5) 

 American boys, (6) German boys. 



The order of the eruption of the individual teeth of the German 

 and American group is (1) lower median incisors, (2) lower first 

 molars, (3) upper first molars, (4) upper median incisors, (5) 

 lower lateral incisors, (6) upper lateral incisors, (7, 8) upper 

 median premolars and lower canines, (9) lower median premolars, 



