Contained within the 3rd Edition (1957) of the Atlas of Canada is a map that shows six condensed maps of different demographic statistics. The six measures are: birth rates per 1000 population, death rates per 1000 population, natural increase rates per 1000 population, marriage rates per 1000 population, infant mortality rates per 1000 live births, and number of children at home per family. The data for the maps on this plate were derived from the 1951 Census of Canada. It should be noted that birth rates, death rates and infant mortality rates are exclusive of stillborn births and that infant mortality rates are for infant mortalities under one year of age. The map entitled Children at Home pertains to unmarried sons and daughters, including stepchildren, adopted children, guardianship children and wards 24 years of age and under, living with their parents or guardians.