( 326 ) 



to South. The number is greatest in Friesland, viz. 43.8%. smallest 

 in Limburg 21.8%, so reduced to half of the number for Friesland. 

 The fourth column affords a survey of the increase of pure brunettes. 

 Herein Drente shows the smallest number, 1.3%, Limburg the 

 greatest 4.6 / - The figures in this column point to a distinct increase 

 in a southern direction. From this table something else appears that 

 is important for the characterisation of redhairiness. If namely the per- 

 centages of the "pure" types are added up, so the blondes and the 

 brunettes, this gives for Friesland a total of 44.9%, for Limburg 

 only 26.4'/ , while between these two numbers those of the other 

 provinces are regularly grouped. So the number of mixed types is 

 in the south of our country nearly 20% higher than in the north. 

 As a general result we may state a decrease of the pure blondes, 

 an increase of the pure brunettes and the mixed types in a southern 

 direction. 



And notwithstanding in Friesland twice as many pure blondes are 

 found as in Limburg, a change in the number of redhaired individ- 

 uals is not perceptible. Therefore 1 think 1 am entitled to deny 

 the existence of any relation between the two phenomena on the 

 ground of the figures found. But my table also induces me to reject 

 the opinion which is sometimes given, that redhairiness should be 

 a consequence of a crossing between a blonde and a brunette indi- 

 vidual. If this were the case, an increase might be expected of the 

 number of redhaired persons in a southern direction in connection 

 with the increase of mixed types. 



Have I therefore to deny relationship between the blonde and the 

 redhaired type on the ground of the data mentioned, a still stronger 

 proof for this is afforded by another fact, which I had expected as 

 little as the others which have been explained. It is namely the 

 extension of redhairiness among the Jewish school-population. The 

 total number of Jewish children examined at Amsterdam, the Hague 

 and Rotterdam amounted to 9155. Of these 228 were redhaired, 

 i.e. 2.47 %, whilst for the not Jewish population a proportion of 

 2.45 % had been found. The agreement between the two figures is 

 surprising and the importance of the fact for the question put by us, 

 shows itself clearly, when I point out the fact that pure blondes i.e. 

 blondhaired blue-eyed Jews occur only in a proportion of 8.2 % 

 pure brunettes, i. e. black-haired brown-eyed in 18.1 %• From this 

 it proceeds that in our country among the Jewish schoolpopulation 

 with 8.2 % P ure blondes, there occur as many redhaired persons as in 

 Friesland with 43.2% pure blondes. A stronger proof that there is no 

 direct relation between redhairiness and blondness cannot be desired. 



