An investigation of 6098 cases of hair vortexes was made among the people in the Mongolian, the Hui and the Han nationality. The results show that the frequency of single hair vortex is higher in Mongolian nationality than in the other two nationalities but the frequenrcy of double hair vortex is lower. The differences are quite significant(P<0.01). The frequency of double hair vortex is higher in males than in females in each of the three nationalities (P<0.01). There are other four different configuration...