32 OBSERVATIONS AND MEASUREMENTS ACADEMY MEMBERS 



Table 27. — Head breadth 1 



[Memoirs National 

 [Vol. XXIII, 



Subjects 



Average 



Minimum 



Maximum 



Range of variation in percentage of the average 



tr 



cv 



Members of the Academy 



Old Americans 



100 



15. 67 ±0. 035 



14. 7 



17. 



lit. 68 



0. 520 ±0. 025 



3. 32 ±0. 16 



Not old Americans 



50 



15. 84 ±0. 056 



14. 7 



17. 4 



17. 05 



0. 585 ±0. 040 



3. 69 ± 0. 25 



Old Americans 

 at large (total 

 series, except 



mountaineers) 



594 



2 15. 45 



13. 8 



17. 



20. 71 



DISTRIBUTION 



14.7 



15.3-15.7 



15.8-16.2 



17. 3-17. 4 



Old Americans (100) 



Not old Americans (50) . 



Percent 

 2 

 2 



Percent 



20 

 12 



Percent 

 36 

 30 



Percent 

 27 

 34 



Percent 



14 

 16 



Percent 

 1 

 4 



Percent 



2 



i The greatest transverse diameter of the head above the mastoids. Technique in writer's Anthropometry. 

 ' In the 247 laboratory subjects 15.48. 



HEAD HEIGHT 



The height of the head here dealt with is that from the middle of the line of the floors of 

 the two auditory meatus to bregma. 25 It is the same measurement that has been taken on the 

 large series of the old Americans at large and on numerous groups of immigrants to this country, 

 not counting large numbers of Indians, etc. When properly known it is, I am satisfied, the 

 most satisfactory measurement of head height on the living. Its results, which have more value 

 taken separately than those of head length and breadth, follow: 



Table 28. — Head height 



Members of the Academy 



Old Americans 



Not old Americans 



Old Americans 

 at large (total 

 series, except 

 mountaineers) 



Subjects 



Average 



Minimum 



Maximum 



Range of variation in percentage of the average. 



CV- 



100 



13. 93 ±0. 038 



12. 8 



15. 5 



19.38 



0. 565 ±0. 027 



4. 05 ±0. 19 



50 

 14. 05 ±0. 048 



13. 1 



14. 9 

 12. 81 



0. 500 ±0. 034 

 3. 56 ± 0. 21 



594 



1 13. 95 



12. 4 



15. 5 



DISTRIBUTION 



Centimeters - 



Old Americans (100) ___ 

 Not old Americans (50) _ 



Percent 

 12 



13. 3-13. 7 



Percent 

 27 

 16 



13. 8-14. 2 



Percent 



30 

 40 



14. 3-14. 



Percent 

 24 

 30 



14. 8-15. 2 



Percent 



i In the 247 laboratory subjects 13.93. 



30 For technique see my Anthropometry. 



