1 8 H. B. Ferris, M.D. 



Sitting Height. 



The sitting height was measured in 80 males and 68 females. 

 In the males the average was 830 mm., the extremes 941 mm. and 

 641 mm., and the variation range 300 mm. 



In the female the average was 804 mm. and the extremes 

 890 mm. and 698 mm., with a variation range of 192 mm. This 

 shows a greater constancy of body length in the female. Also 

 as the stature variation is greater in both series than in the case 

 of the sitting height, variation in stature in both sexes is due 

 more to variation in the length of the lower extremities than to 

 variations of the body length. 



The Expedition of 1912 found the average sitting height in 

 the male to be 836 mm. with a variation of 184 mm., which is also 

 in close agreement with Chervin's results (840 mm.) as well as 

 those of the present report with the exception that his range of 

 variation was less (114 mm.) than that obtained by the former 

 Expedition and slightly greater than the result obtained by this 

 Expedition (830 mm.). The body height of the Quichua male, 

 then, is a little greater than that of the Labrador Eskimo 

 (810 mm., Duckworth) and considerably less than the average in 

 the English male (905 mm.). The average body height of the 

 Quichua female (804 mm.) is less than that of the male but not 

 relatively to the stature. 



The seriation table shows that while 63.7% of the males in 

 body height are between 819 mm. and 879 mm., only 48.5% of 

 the females are included in these limits. 



Sitting Height Index. 

 The relation of the body height to the stature is indicated by 

 the height sitting-stature index. In the Quichua male this 

 averages 52.5 with a variation range of 34.4 and extremes of 

 70.0 and 35.6. Chervin (67 cases) found that the greatest index 

 was 56.24, and the least 48.25, the variation 7.99 with an average 

 of 52.95. The average according to the results of the 191 2 Expe- 

 dition was 51.6. This index is low (46.5) in the native Aus- 

 tralians and high (54.8) in the Ainos and quite similar to the 

 Quichua in the Shoshoni (52.2) and certain Eskimo (52.5). \ 

 high index represents largely the persistence of an infantile 

 characteristic, viz., relatively short lower extremities. 



