heavier than the graduates, but lighter than the high school 

 students. In the fourth half-year, the weights fluctuate again, 

 the graduates and high school children weighing less than those 

 of 7A. For the two-year period as a whole, high school girls 

 are considerably heavier than the girls in any of the lower 

 grades. 



While our results agree in the main with those of previous 

 observers there are nevertheless striking exceptions which would 

 suggest extreme caution in inferring a positive correlation 

 between height and weight and school grade in children re- 

 ceiving employment certificates. The direct relations are 

 neither as marked nor as constant as found by other observers. 

 It would, therefore, seem that the children in our investigation 

 have certain special characteristics which mark them as a 

 selected group, rather than as a fair sample of New York 

 boys and girls in the age-period 14 to 16. It should be re- 

 membered that the boys and -girls under discussion do not 

 represent school children in general, but only those who were 

 on the point of leaving school to go to work. The various 

 figures appear to show that children of better physique go to 

 work at the earliest opportunity. This will explain the anomaly 

 that our children of 7A are so frequently taller and heavier 

 than those in the next higher grades. The more delicate 

 children are apparently allowed to continue their schooling 

 for longer periods before being sent to work. This fact 

 is responsible for the variations from the findings of other 

 observers. 



NATIONALITY 



Thus far, our principal concern has been with the children 

 as a group. Our data, however, permit us to inquire also to 

 some extent into the differences in the physical development 

 of our boys and girls which may be attributed to their several 

 nationalities. This is especially interesting in view of the 

 many racial groups composing the population of New York 

 City, and the important and perplexing questions that con- 

 stantly arise in the adjustment of these races to American 

 conditions. 



It has not been possible in this study to classify the material 

 rigidly on the basis of nationality or race stock. Instead, the 

 racial terminology, which we have used as a matter of con- 



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