Abstract: The author observed and measured 4710 hair transverse sections of 463 healthy people of Han nationality. The relations between the age and hair diameter were analysed. The Chinese hair transverse sections were compared with those of European, other Asian and American samples. The result shows that the various hair diameters of the European and American are shorter than those of the Asian. However the index of hair in this paper is intermediate between those of the Enropean and American in one side, and Japaness and Korean in another side.

Key words: Hair; Micrometry; Jiujiang; Han nationality