1923. No. 4- PHYSICAL DEVELOPMENT OF CHILDREN AND YOUNG PEOPLE. 49 



der Streckung" and ■"Perioden der Fülle"" (originallv copied after Bar- 

 tels) must he stamped as absolutely erraneous. Concerning this I refer to 

 a more detailed account about the years 2 — 6, published before: there is 

 in childhood no undulating line in the medium development, on the con- 

 trary there is an unbroken decline in the weight-height proportion — an 

 unbroken "Streckung", any way after the age of two -". After the close 

 of the child-age proper, in the pre-puberty period, the proportion turns 

 about, what we in the present work already have demonstrated Photo- 

 graphs of medium types — after objectiv number-selection — also prove, 

 what here has been referred to for the ages 2 — 6 years. We shall now 

 report on the succeeding age 7 to 14 years. Figs. 18 a and b. 



The method of selection must first be demonstrated, it depends 

 wholly and entirely upon this, whether the photographs can get any 

 scientific value (and not onlv become an 



entertaming illustrated contribution to a ,-^ 



strongly subjective interpretation). We V. ^'^''^ 



proceeded in the following way : The cards ^^^' 



of all the examined school children were 

 gone through. Those cards were selected, i 

 which showed a conformity to the average . 

 number of the age within the following nar- Z S b 'iO U 12 15 H 



row boundaries: Bodily height from 2 cm. Fig- n 'see page 441. 



below^ until i cm. abowe the average : weight 



from I kg. below till i kg. above and — what there for the sum total 

 of the impression is still more important — weight-height index with 

 a permissible deviation of at most 0.03 upward or downward. Thus 

 have been secured very representative average types from the numbers 

 alone. All in all a little over 400 report cards were selected, age 7 to 14 

 (by "7" is meant 6% to 7%. &:c.). In order not to include anv visiblv 

 pathological, respective abnormal children with accidental medium 

 numeric quantity, all were inspected, wholly undressed, and some ex- 

 cluded. All in all 299 children were photographed, averagely 21 per 

 year class of boys and 17 of girls. The photographs were taken bv 



" I express myself here only concerning those ages, where I have undertaken per- 

 sonal examinations. We do not speak here about oscillations dependent upon 

 seasons of the year and change of surroundings (vacations). Concerning this can 

 be referred to ancther work ("The influence of seasons and vacations on the 

 bodily development of school children" by N. C. Hertzberg and Carl Schiötz. 

 Medicinsk Revue, January 1922). 



^ The combined examinations — measuring and weighing — were undertaken in 

 March 1921, the same as in 1920, which are presented here. The photographies 

 were taken in April and May 1921, especially the last month. A slightly greater 

 "under-measure"' (2 cm.) was therefore calculated, as the spring months are com- 

 paratively vigorous months for the gro>^th of height. 



Vid.-Selsk. Skrifter. M.-X. Kl. 1923. No. 4. 4 



