34 American Statistical Association. 



The proposed system of physical examination requires — 



I. The collection of sufficiently extensive data by the 

 generalizing method. 



II. The determination of the means and the probable 

 deviations of height, weight, girth of chest, strength of 

 squeeze, etc. for each age. 



III. The division of the individuals at each age into groups 

 in terms of the probable deviation from the mean height, as 

 illustrated above, and the calculation of the mean and proba- 

 ble deviation of the weight, girth of chest, etc. of each group. 



IV. The determination of the mean physical development 

 of the pupils in each class or grade of the school system. 



V. The physical examination of each applicant for entrance 

 to any grade. 



These data permit the enforcement of the following regu- 

 lation : No pupil whose physical development deviates more 

 than ±d from the weight, etc. of the mean pupil of his 

 height in a class which his mental output would otherwise 

 entitle him to enter shall be admitted to that class unless 

 with the approval of a medical expert, if possible a regularly 

 appointed school physician, who shall testify that the pupil's 

 strength shall be equal to the strain. 



