DURING POST-NATAL DEVELOPMENT. -")()() 



subsequent increase during adolescence. (See table K.) For data on the relative 

 length of the trunk measured from the sternal notch to the symphysis pubis during 

 growth the reader may consult Godin (1903, 1910) and Schwerz (1910); for the 

 length of trunk measured from the seventh cervical vertebra to the end of the 

 sacrum, O. Ranke (1905), Ernst (1906); for the distance first palpable vertebra to 

 the end of the sacrum, Quetelet (1870). 



Height of iliac crest. There are few available data on the relative height of the 

 iliac crest during growth. The curve shown in chart I is based on comparatively 

 few observations and can be looked upon merely as a tentative curve. So far as I 

 am aware, Zeising (1858) is the only author who has endeavored to give figures of 

 the height of the top of the crest during the whole growth-period. The curve in the 

 main follows his data but has been checked up by a few observations of my own. 

 It represents the highest point of the crest. The anterior superior iliac spine, which 

 has been much more frequently measured, is about two-fifths of the distance between 

 this point and the ischial tuberosity. Landsberger (1888) appears to have measured 

 to a point on the crest ventral to and lower than the top of the crest. 



Height of anterior superior iliac spine. The curve for the anterior iliac spine 

 has not been plotted in chart I because the somewhat limited data at hand do not 

 give concordant results. The level which Quetelet designates "aux hanches" 

 appears to be somewhat higher than the anterior superior iliac spine, but lower than 

 the higher part of the iliac crest. The data of Schwerz (1910) cover merely the 

 school-child period. For the younger children the data of Schwerz show the iliac 

 spine about 2 per cent of the stature below the corresponding figures of Quetelet. 

 For the older individuals the difference is about 1 per cent of the stature. Schwerz 's 

 data show the iliac spine at 53.9 per cent of the stature in boys 45 inches tall, 57.7 

 per cent in boys 62 inches tall, and 57.3 per cent in boys 66.7 inches tall. The curve 

 for girls of similar height corresponds closely with that for boys. Godin (1903) 

 gives slightly lower values. According to this author the relative increase in the 

 height of the iliac spine which takes place about the fifteenth year is in part due to 

 the decrease in the inclination of the pelvis which takes place at this period. 



Top of pubic crest. No curve has been plotted for this height in chart I because 

 of the confusion such a curve might make with that plotted for the top of the tro- 

 chanter. Quetelet (table E) gives data for this level from birth to maturity. A curve 

 based on his data runs nearly parallel with and about 12 per cent of the stature 

 below the curve for the iliac crest shown in chart I. Hall (1896) gives data on the 

 height of the pubic crest in American boys 50 to 68 inches in height, which closely 

 parallel Quetelet's data. Godin (1910) gives a relatively greater height by about 

 2 per cent of the stature for French boys 13.5 to 17.5 years of age. The data given 

 in table L on American college students correspond in value with those given by 

 Quetelet for adults, but are slightly lower for the men (50.3 as compared with 50.8). 

 The American college statistics show the crest relatively slightly lower in short than 

 in those of medium height and tall individuals. 



Top of the great trochanter. The data of Weissenberg (table D), Godin (1910), 

 and Ernst (1906) correspond closely with the curve for this level given in chart I 



