CONSANGUINEOUS MARRIAGES 



257 



in which the parents came from different countries. The results 

 are here given in tabular form : 



Relative Fecundity of Pure-Bred and Half-Bred Families in Minneapolis 



Pure-Bred Families 



Group 



1 Dutch 



2 French-Canadian 



3 Irish 



4 Swedish 



5 Norwegian 



6 German 



7 Canadian 



8 Scotch 



g French 



10 Danish 



11 English 



12 Welsh 



13 American 



14 Scotch-Irish 



No. of 

 families 



30 



282 



1,022 



4,961 



3,028 



3. SOS 



372 



184 



ISS 



246 



523 



77 



8,614 



16 



No. of 

 children 



106 



894 



2,670 



12,564 



7,414 



8,559 



838 



411 



334 



509 



1,014 



127 



I3,i56 



24 



No. of 

 children 



per 

 family 



53 

 IS 

 61 



53 

 44 

 44 

 25 

 23 

 14 

 06 

 93 

 64 

 52 

 SO 



No. of 

 amalga- 

 mating 

 groups 



13 

 16 

 23 



IS 

 22 



33 

 13 

 18 



21 



9 



20 

 17 

 28 

 IS 



Balf-Bred Families 



No. of 

 families 



181 



291 



2,100 



2,004 



2,148 



3.S20 



86i 



897 



66s 



265 



1,882 



233 



3.859 



229 



No. of 

 children 



331 



627 

 4,282 

 3,625 

 3,868 

 6,23s 

 1,670 

 1,602 

 1,251 



471 

 3,252 



399 

 6,392 



395 



Average 

 children 



per 

 family 



83 

 15 

 04 

 81 

 80 

 77 

 94 

 78 

 88 

 77 

 72 

 71 

 66 

 73 



Expected 

 average 



2. 1 

 2. 2 

 2. 1 

 2.0 

 1.8 

 1.9 

 1.8 



The differences between the sizes of homogamic and hetero- 

 gamic marriages are striking. But are they due to differences in 

 the natural fertility or like and unlike unions? It is especially 

 noteworthy that the number of native Americans given in the 

 table is far greater than any other nationality. It is also note- 

 worthy that there are great differences in the size of the families 

 among the people in different countries,— differences which are 

 probably due to a small extent to physiological causes, but are 

 mainly the result of other factors which have been discussed in a 

 previous chapter. In a marriage between a Dutch man or woman 

 and a person of another nation the chances are, other things 

 equal, that the person would be an American, owing to the nu- 

 merical preponderance of the latter stock. Since the size of the 

 American family is notoriously small, the influence of American 

 custom would be a strong element in determining the number of 

 children in the mixed marriage. Persons from nationalities with 

 large families, if marrying outside their group, would be apt to 



