HRULRKA] PHYSIOLOGICAL AND MEDICAL OBSERVATIONS 



(rrayncss — Conliiuied 



101 



SUMMARY 



Grayness 



It is seen from the above table that before the age of 30 (approxi- 

 mately) the percentage of individuals beginning to be gray "' is very 

 small, and that between the ages of 30 and 40, thi'ee-fourths, and 

 between 40 and 50, more than one- third of the men and one-fourth 

 of the women have no gray hair at all, or only so very little that 

 they need not be considered. 



The differences between the tribes are not great enough to have 

 particular significance. In individuals above 30 grayness seems -to 

 prevail slightly more in the females than in the males. 



Loss of hmr. — Baldness, though not invariably a sign of aging, may 

 best be treated in this connection. It is, in any form, very uncom- 



o The term "few" was used, in want of a better one, for all cases where stray gray hairs could be seen 

 without a special search. 



3452— Bull. 34—08 11 



