CARL SCHIØTZ. M.-N. Kl. 



PHYSICAL DEVELOPMENT OF CHILDREN AND 



YOUNG PEOPLE DURING THE AGE 



OF 7 — 18 YEARS 



Before \ve take up tlie closer study of the details it should be noted, 

 that "6 years" means 6.0, therefore not children "past six years, but not 

 yet seven", but those nearer to 6, than they are to either 5 or 7, in other 

 words children between 5^/è and 6Vè exclusive. Individuals exactly on 

 the day 6% were ^ divided between the 6 or r group, if there were as 

 many as two, otherwise they were not included. More than two exactlv 

 on the half-year day was never found. This method — and not "past" 

 5 vears — was used in compliance with international anthropologie 

 demands. 



The investigations at the schools were conducted after general 

 instruction from the author and special instructions from the school 

 physicians by nurses and teachers, partly also by school physicians them- 

 selves. Of course, errors of measurement may occur in such a large 

 investigation as this. But the school material is so great, that the com- 

 puted statistical values cannot possibly to any degree have been affected 

 therby. 



I. Height of the body. 



As to the technic followed it should be stated, that the same kind 

 of apparatus was used at all the schools, namely one specially constructed 

 height-measurer with fixed foot-tray, on which the child stands during 

 the investigation. (These apparatuses were ordered from the instrument- 

 maker Gallus, Christiania.) Thereby every deviation from the vertical 

 position of the measuring rod itself was hindered. The child stands 

 facing the rod, head straight forward (not upward) and is required to 

 stretch itself ad maximum. Thereby is attained a more perfect stretching, 

 than when the back is leaned against the rod. Centimeter with one 

 decimal is written down. If the rod only is marked with whole or half 

 centimeters, the millimeters between are taken according to estimation. 



The results of the height investigations may be seen from the fol- 

 low insr table: 



^ Without inquiry into the results of the measurements. 



