ERUPTION OF THE PERMANENT TEETH 119 



The stature of the FiHpino boys is 11 cm. greater than that 

 of the girls beyond the age of 20, and this is in excess of the 

 usual sexual difference, which is often not more than 5 cm. 

 This may be due to a greater inheritance of the father's stature 

 by the boys and of the mothers' stature by the girls because the 

 fathers of many of the children are Spanish and Chinese and the 

 mothers are Filipinos, and the stature of the Spanish and Chinese 

 is greater than that of the Filipinos. This may be a confirmation 

 of Pearson's findings that males inherit stature from the father 

 and females from the mother. 



There are so few Filipinos below the age of 16 for each sex 

 that the average has only an approximate value. There is also 

 greater variability in stature at the ages of 12, 13 and 14 among 

 the Filipinos, than either before or after. For instance at the 

 age of 10, the extremes are only 15 cm. apart, and at the age of 

 15 only 25 cm. apart, whereas at 12, 13 and 14 years, they are 

 30, 35 and 35 cm. apart respectively. It is noted that the Ger- 

 man and American children exhibit a variability that is greater 

 with advancing years. The reverse is true of the Filipinos. 



2. Review of literature and discussion 



When the stature of the Ann Arbor boys of American parent- 

 age is compared with the stature of the Boston boys (13,691, 

 Bowditch (11)) of American parentage it is found that the Ann 

 Arbor boys are about 5 cm. taller at the ages of 5 and 6, and this 

 difference decreases until the age of 15 is reached after which the 

 boys of both places have about the same stature. This is true 

 also of the Nebraska boys (5,476, Hastings (26)) when compared 

 with the Ann Arbor boys, and the difference with them at the 

 early ages is even more marked in favor of the Ann Arbor boys. 

 It is evident that the boys of Ann Arbor attain their early stature 

 quicker than the boys of Boston. This is probably due to the 

 fact that the children of Ann Arbor have a more favorable envi- 

 ronment than the children of Boston. Bowditch found that the 

 boys of the private schools in Boston were taller than the boys 

 of the public schools, and taller than the boys of the laboring 



