Fig. 43—If child mortality is eliminated, and only those individuals studied who live to the age of 20 or longer, the small families are still found to be handicapped. In general it may be said that the larger the family, the longer a member of it will live. Large families (in a normal, healthy section of the population) indicate vitality on the part of the parents. This does not, of course, hold good in the slums, where mental and financial inefficiency are abundant. Within certain classes, however, it may be said with confidence that the weaklings in the population are most likely to be from small families. Alexander Graham Bell's data.
