130 ROBERT BENNETT BEAN 



no difference in the time of eruption of the canine teeth on the 

 two sides of the mouth but the lower canines erupt earher than 

 the upper. The difference in time between the eruption of the 

 lower and upper canines is about one year in the American boys, 

 less than a year in the German boys, and more than a year in 

 the German and American girls. There is no order of eruption 

 of the canines except that the lower erupt earlier than the upper. 



The canines erupt earlier in the girls than in the boys, except 

 that the upper canines erupt earlier in the Filipino boys than in 

 the Filipino girls. The sexual differences amount to at least 

 two years for the Filipinos, between one and two years for the 

 Germans, and about one year for the Americans. 



The upper canines erupt at about the same time in the Filipino, 

 German and American girls, but the lower canines erupt at least 

 three years earlier in the Filipino girls than in the German and 

 American girls. There is almost no difference between the Ger- 

 man and American girls in this. The canmes erupt anywhere up 

 to four years earlier in the Filipino boys than in the American or 

 German boys, and the American boys are slightly more precocious 

 than the German boys. The Filipinos of both sexes are preco- 

 cious in the eruption of the canine teeth, the Germans are back- 

 ward and the Americans are intermediate. 



The viedian premolars. The median premolars begin to erupt 

 in some individuals as early as the age of 8 years and the teeth 

 are nearly if not all through the gums at the age of 15 years. 



There is practically no difference in the time of eruption on the 

 two sides of the mouth, but the upper median premolars erupL 

 slightly earlier than the lower, although this difference is con- 

 siderably less than one year. 



The median premolars erupt in the following order: (1) left 

 upper; (2) right upper; (3) right lower; (4) left lower. The 

 median premolars erupt first in the Filipinos, second in the Ameri- 

 cans and third in the Germans, although the differences are not 

 great between the last two. The median premolars erupt earlier 

 in the girls than in the boys, except that apparently the upper 

 premolars erupt slightly earlier in the Filipino boys than in the 

 Filipino gu'ls, but this is questionable. 



