100 American Statistical Association. 



Summary of Results. 



The most important results of the foregoing investigation 

 may be enumerated as follows : — 



I. The growth of children takes place in such a way that 

 until the age of eleven or twelve years bo3^s are both taller 

 and heavier than girls of the same age. At this period of 

 life girls begin to grow very rapidly, and for the next two or 

 three years surpass boys of the same age in both height and 

 weight. Boys then acquire and retain a size superior to that 

 of girls who have now nearly completed their full growth. 

 This statement is based upon observations on several different 

 races and in various conditions of life. 



II. Children of American-born parents are, in this com- 

 munity, taller and heavier than children of foreign-born 

 parents, a superiority which seems to depend partly on the 

 greater average comfort in which such children live and grow 

 up, and partly upon differences of race or stock. 



III. Pupils of American parentage at the public Latin 

 School, private Latin School, and Massachusetts Institute of 

 Technology are (apparently for similar reasons) superior in 

 height and weight to the generality of boys of American 

 parentage attending the public schools. 



IV. Pupils of the same selected schools are also taller and 

 heavier than English boys of the non-laboring classes attend- 

 ing public schools and universities, the superiority in weight 

 being, as a rule, more marked than that in height. 



V. The relation of weight to height in growing children 

 is such that at heights below 58 inches boys are heavier than 

 girls in proportion to their stature. At heights above 58 

 inches the reverse is the case. 



Conclusion. 



Both the number and the value of the conclusions arrived 

 at in this investigation are diminished by the lack of similar 

 collections of statistics in other communities with which a 



