420 BEAN. 



The two uaost significant features of the relation of height to age are 

 the apparently early matmity of the Igorots and their aquisition of 

 maximum height at an earlier age tlian Europeans. This agrees with 

 the conclusions of Martin (28)^ regarding the inhabitants of the Malay 

 Peninsula. Hastings* 17) has presented the average height for each age 

 of 8,245 typical male American school children, his figures compared 

 with the height of the Igorots shows a difference of about 10 centimeters 

 in favor of the American children at each age up to 17, and a further 

 increase of about 10 centimeters to the age of 19, when the American 

 boy is 20 centimeters taller than the Igorot. The actual height as well 

 as the growth of the American children conforms well with Topinard's 

 deductions from measurements of 1,104,841 Europeans (61). The age 

 in the latter instance is carried beyond 30 and the greatest height is 

 found to be between 30 and 40 years. There is an annual increment 

 in height up to 35 years(60). This increment decreases during tlie pe- 

 riod of from 1 to 5 years, makes a sudden slight increase at 6, remains 

 stationary from 7 to 10, increases progressively fj'oni 11 to W, decreases 

 suddenly at 17 and slowly thereafter to the age of 35, when the increase 

 in height ceases. 



The growth of the Igorots is similar to this. 



The stature increases steadily from 10 to 17 years, there is a decrease 

 to the age of 20, then an increase to the maximum between 20 and 30. 

 After 30 the height decreases slightly to the age of 50. 



The relative height increment of the Igorot boy is not imlike that of 

 the European girl,^ becaiise the annual increment decreases in both from 

 the age of 13 to 19(60). 



DISCUSSION or STATURE. 



In conclusion it may be said that the growth of the Igorot is similar 

 to that of the European, but that it is more rapid. The Igorot male 

 is as well developed at the age of 16 years, as the European at 18. The 

 maximum height, of the Igorot is reached between 20 and 30, that of the 

 European ten years later. The relative growth of the Igorot boy is in- 

 termediate between that of the European girl and the European boy. 

 The height of the different groups of" Igorots ( ^3 ) varies directly with 

 the altitude and inaccessibility of their location, but the rate of growtli, 

 the time of maturity and the actual height are probably characteristic 

 of the stock and not due to environment. 



The stature of the adult male Igorots is represented by a curve which 

 is seen to be irregular. (Fig. 1.) With only 104 individuals some 

 irregularities in the curve might be expected, whicli would be smoothed 

 if 1,000 had been measured, but evidence indicates that irregularities in 

 a curve of 100 individuals mean a diversity in type due to previous mix- 



' European is used in the sense of the white or Caucasian. 



