Chart I shows the line of descent of the Kallikak family from their first colonial ancestor. It was Martin who divided it into a bad branch on one hand and a good branch on the other. Each of these branches is traced through the line of the eldest son down to a person of the present generation. On the bad side it ends with Deborah Kallikak, an inmate of the Training School at Vineland, on the good side with the son of a prominent and wealthy citizen of the same family name, now resident of another State.
Chart II shows the children of Martin Sr. by his wife and by the nameless feeble-minded girl, and also the children of Martin Jr.
Then follow Charts III to IX and A to K, giving in detail each of these two branches, the upper series being the normal family, the descendants of Martin Kallikak Sr. through his wife: the lower is the bad family, his descendants through the nameless feeble-minded girl who was not his wife.