PIGMENTATION IN THE OLD AMERICANS, WITH NOTES 

 ON GRAYING AND LOSS OF HAIR. 1 



By Alk§ Hrdlicka. 



CONTENTS. 



Page. 

 Introduction 



Definitions 445 



Effects of mixture 447 



Classification 440 



Color of skin 450 



The hair 453 



Regional differences 45S 



Red hair 459 



Eye colors in the red-haired 461 



Anomalies of hair pigmentation, 462 



Page. 



The eyes -j62 



Regional differences 467 



Correlation of eye and hair color 468 



Anomalies of eye pigmentation. 470 



Blonds and brunets 470 



Regional distribution 472 



„ ° . 472 



Comparative *'~ 



Gray hair 478 



Temporary grayness * ov 



Loss of hair 480 



Conclusions 48*. 



INTRODUCTION. 



By anthropology of the Old Americans is meant the status, physi- 

 cally, physiologically, and demographically, of the oldest parts of 

 the white population of the United States, as contrasted with the 

 American population at large and with other units of the white race. 



Since discovery this country has been an ever-increasing eddy 

 that drew in, and still draws the offshoots and surplus of a wide 

 range of white populations in the older parts of the world, and a 

 large majority of these newcomers have remained, made this their 

 permanent home, and intermingling with others have been gradually 

 building up the great new nation. 



The changed environment, the many new stimuli, the freer and more 

 virile as well as more strenuous life, the better and more abundant 

 nourishment, the more wholesome conditions in general, and besides 

 all the steadily growing admixture of blood, have now been acting 

 on the older parts of this nation for from one to over three centu- 

 ries. What are the results? Here is a great natural laboratory, the 

 subject of whose multitudinous experiments has been man himself: 

 How has he responded, and what are the indications for the future? 



1 Reprinted by permission from the American Journal of Physical Anthropology, vol. v. 

 No. 2, May, 1922. 



443 



