OF THE HUMAN BREED. 19
TABLE IV. Distribution of sons. (1) One parent of class V., the other unknown. (2) Both parents of class
V (from Table II., with decimal point and an o).
Distribution of Sons
One V-parent Two V-parents ...
Position of the filial centre of (I) =1.44, of (2) = 2.89. When
both parents are T it - r58.
Marriage of like to like.-In each class of
society there is a strong tendency to intermarriage, which produces a marked effect in the richness of brain power of the more cultured families. It produces a still more marked effect of another kind at the lowest step of the social scale, as will be painfully evident from the following extracts from the work of Mr. C. Booth (i. 38), which refer to his Class A, who form, as has been said, the lowermost third of our" v and below." "Their life is the life of savages, with vicissitudes of extreme hardship and occasional excess. From them come the battered figures who slouch through the streets and play the beggar or the bully. They render no useful service, they create no wealth ; more often they destroy it. They degrade whatever they