HEREDITY OF HAIR FORM AMONG THE 

 FILIPINOS 



ROBERT BEXXETT BEAX, M.D. 

 Associate Professor of Anatomy, 



While connected with the Philippine Medical School in 

 Manila, in the year 1909 two of my pupils, Maria P. 

 Mendoza and Manuel Ramirez, became interested in the 

 heredity of hair form through the work of Gertrude C. 

 Davenport and Charles B. Davenport 1 and they collected 

 the records of 36 families, largely Chinese-Tagalog 

 crosses, although two families were Negritos who had 

 married Filipinos. 



They tested the hair form by making sections of hair 

 dipped in thick celloidin hardened in 70 per cent, alcohol 

 and cross-sectioned with a hand microtome, after which 

 the sections were examined under the low power of the 

 microscope, the measurements being made with an ocular 

 micrometer. They divided the forms of hair into — 

 Straight, with diameters of 100 : 90 or over, 

 Wavy, with diameters of 100: 70-90, 



They decided that wherever a union occurred between 

 individuals with straight and wavy hair the straight hair 

 predominated. It seems expedient, however, to consider 

 the hair form in single families as welj &s en masse. 



consider individuals rather than the mass, except in the 

 formulation of laws that take into consideration prob- 

 able errors in the mass. In Table I, showing the result, in 

 mass, of crossing different 



