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gically a more homogeneous part, it is the Saxon element of our 
population, which distinguishes itself by a higher Index cephalicus. 
A second group ineludes the provinces of Friesland, N.-Holland, 
Utrecht, Gelderland and Z.-Holland, in which the Index cephalicus 
is strikingly equivalent, with the exception of Zuid-Holland, in which 
a relatively strong decline occurs, The average would be lower for 
Gelderland too, if the population of the “Achterhoek” — with its 
own Index of 81.1 — had been left out of consideration. 
In the second group the Index cephalicus reaches its highest point 
in 80.5; consequently the population of these provinces is a little 
more long-headed than that of the north-eastern part of our country. 
This is most evident in the province of Zuid-Holland, in which the 
inhabitants have the smallest degree of round-headedness. 
The part of our country meant here, is that one, in which the 
Frisian element of our population predominates and which is charac- 
teristically different from the Saxon element by a larger degree of 
long-headedness. 
The three southern provinces, which, according to my investi- 
gations, as regards the pigmentation of the population, form a unity, 
are not uniform as regards the Index cephalicus. The index reaches 
its highest point, viz. 81.5 in N.-Brabant, from which it appears, 
that here the most round-headed part of our population lives. Lim- 
burg and Zeeland agree, with only a slight difference, and are 
nearer to the proportion, occurring in the Western provinces. In 
connection with the high degree of pigmentation these facts point 
to the population being very mixed. However, this is easy to point 
out for the province of Zeeland. While the Index cephalicus amounts 
to 80.08 for the whole of the province, it falls to 79.9 with 
respect to Walcheren. The population of the most western part of 
Zeeland has a more long-headed type than the people living in the 
eastern part. This phenomenon is not unique. In the provinces of 
Noord- and Zuid-Holland the people, living in the villages on the 
coast and on the edge of the dunes have a longer and narrower 
head than the people living more inland. 
About this fact, I said before, that the populations of Amsterdam 
and Rotterdam were left out of account for the caleulation of the 
Index cephalicus of the provinces of Noord- and Zuid-Holland. I did 
this on purpose, because the inhabitants of these towns have a 
lower average index than the population living in the country. And 
because the number of those citizens measured, does not form an 
unimportant part of the whole population of the province, the value 
of the provincial average would be influenced too much by tbe 
